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Decay tables

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z



133Ba (Barium-133 / Ba-133) Half-life: 28.79 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9945 0.9891 0.9837 0.9783 0.9730 0.9677 0.9624 0.9571 0.9519 0.9467 0.9415
1 0.9364 0.9312 0.9261 0.9211 0.9160 0.9110 0.9061 0.9011 0.8962 0.8913 0.8864 0.8816
2 0.8768 0.8720 0.8672 0.8625 0.8577 0.8531 0.8484 0.8438 0.8391 0.8346 0.8300 0.8255
3 0.8210 0.8165 0.8120 0.8076 0.8032 0.7988 0.7944 0.7901 0.7857 0.7814 0.7772 0.7729
4 0.7687 0.7645 0.7603 0.7562 0.7520 0.7479 0.7438 0.7398 0.7357 0.7317 0.7277 0.7237
5 0.7198 0.7158 0.7119 0.7080 0.7042 0.7003 0.6965 0.6927 0.6889 0.6851 0.6814 0.6777
6 0.6740 0.6703 0.6666 0.6630 0.6593 0.6557 0.6522 0.6486 0.6451 0.6415 0.6380 0.6345
7 0.6311 0.6276 0.6242 0.6208 0.6174 0.6140 0.6107 0.6073 0.6040 0.6007 0.5974 0.5941
8 0.5909 0.5877 0.5845 0.5813 0.5781 0.5749 0.5718 0.5687 0.5656 0.5625 0.5594 0.5563
9 0.5533 0.5503 0.5473 0.5443 0.5413 0.5383 0.5354 0.5325 0.5296 0.5267 0.5238 0.5209
10 0.5181 0.5152 0.5124 0.5096 0.5068 0.5041 0.5013 0.4986 0.4959 0.4931 0.4904 0.4878
11 0.4851 0.4824 0.4798 0.4772 0.4746 0.4720 0.4694 0.4668 0.4643 0.4618 0.4592 0.4567
12 0.4542 0.4517 0.4493 0.4468 0.4444 0.4419 0.4395 0.4371 0.4347 0.4324 0.4300 0.4277
13 0.4253 0.4230 0.4207 0.4184 0.4161 0.4138 0.4116 0.4093 0.4071 0.4048 0.4026 0.4004
14 0.3982 0.3961 0.3939 0.3917 0.3896 0.3875 0.3854 0.3833 0.3812 0.3791 0.3770 0.3749
15 0.3729 0.3709 0.3688 0.3668 0.3648 0.3628 0.3608 0.3589 0.3569 0.3549 0.3530 0.3511
16 0.3492 0.3473 0.3454 0.3435 0.3416 0.3397 0.3379 0.3360 0.3342 0.3324 0.3305 0.3287
17 0.3269 0.3252 0.3234 0.3216 0.3198 0.3181 0.3164 0.3146 0.3129 0.3112 0.3095 0.3078
18 0.3061 0.3045 0.3028 0.3011 0.2995 0.2979 0.2962 0.2946 0.2930 0.2914 0.2898 0.2882
19 0.2866 0.2851 0.2835 0.2820 0.2804 0.2789 0.2774 0.2759 0.2743 0.2728 0.2714 0.2699
109Cd (Cadmium-109 / Cd-109) Half-life: 461.4 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9925 0.9851 0.9777 0.9704 0.9631 0.9559 0.9488 0.9417 0.9346
50 0.9276 0.9207 0.9138 0.9070 0.9002 0.8934 0.8868 0.8801 0.8735 0.8670
100 0.8605 0.8541 0.8477 0.8413 0.8350 0.8288 0.8226 0.8164 0.8103 0.8043
150 0.7982 0.7923 0.7863 0.7805 0.7746 0.7688 0.7631 0.7574 0.7517 0.7461
200 0.7405 0.7349 0.7294 0.7240 0.7186 0.7132 0.7078 0.7026 0.6973 0.6921
250 0.6869 0.6818 0.6767 0.6716 0.6666 0.6616 0.6566 0.6517 0.6468 0.6420
300 0.6372 0.6324 0.6277 0.6230 0.6183 0.6137 0.6091 0.6046 0.6000 0.5955
350 0.5911 0.5867 0.5823 0.5779 0.5736 0.5693 0.5650 0.5608 0.5566 0.5524
400 0.5483 0.5442 0.5401 0.5361 0.5321 0.5281 0.5241 0.5202 0.5163 0.5125
450 0.5086 0.5048 0.5011 0.4973 0.4936 0.4899 0.4862 0.4826 0.4790 0.4754
500 0.4718 0.4683 0.4648 0.4613 0.4579 0.4544 0.4510 0.4477 0.4443 0.4410
550 0.4377 0.4344 0.4312 0.4279 0.4247 0.4216 0.4184 0.4153 0.4122 0.4091
600 0.4060 0.4030 0.4000 0.3970 0.3940 0.3910 0.3881 0.3852 0.3823 0.3795
650 0.3766 0.3738 0.3710 0.3682 0.3655 0.3628 0.3600 0.3573 0.3547 0.3520
700 0.3494 0.3468 0.3442 0.3416 0.3390 0.3365 0.3340 0.3315 0.3290 0.3265
750 0.3241 0.3217 0.3193 0.3169 0.3145 0.3122 0.3098 0.3075 0.3052 0.3029
800 0.3006 0.2984 0.2962 0.2939 0.2917 0.2896 0.2874 0.2852 0.2831 0.2810
850 0.2789 0.2768 0.2747 0.2727 0.2706 0.2686 0.2666 0.2646 0.2626 0.2607
900 0.2587 0.2568 0.2549 0.2529 0.2511 0.2492 0.2473 0.2455 0.2436 0.2418
950 0.2400 0.2382 0.2364 0.2346 0.2329 0.2311 0.2294 0.2277 0.2260 0.2243

252Cf (Californium-252 / Cf-252) Half-life: 2.65 years **

days 0 10 20 30 40 50 60 70 80 90
0 1.0000 0.9929 0.9858 0.9787 0.9717 0.9648 0.9579 0.9511 0.9443 0.9375
100 0.9308 0.9242 0.9176 0.9110 0.9045 0.8981 0.8917 0.8853 0.8790 0.8727
200 0.8665 0.8603 0.8541 0.8480 0.8420 0.8360 0.8300 0.8241 0.8182 0.8124
300 0.8066 0.8008 0.7951 0.7894 0.7838 0.7782 0.7726 0.7671 0.7616 0.7562
400 0.7508 0.7454 0.7401 0.7348 0.7296 0.7244 0.7192 0.7140 0.7089 0.7039
500 0.6989 0.6939 0.6889 0.6840 0.6791 0.6743 0.6694 0.6647 0.6599 0.6552
600 0.6505 0.6459 0.6413 0.6367 0.6321 0.6276 0.6231 0.6187 0.6143 0.6099
700 0.6055 0.6012 0.5969 0.5927 0.5884 0.5842 0.5801 0.5759 0.5718 0.5677
800 0.5637 0.5596 0.5556 0.5517 0.5477 0.5438 0.5399 0.5361 0.5323 0.5285
900 0.5247 0.5209 0.5172 0.5135 0.5099 0.5062 0.5026 0.4990 0.4955 0.4919
1000 0.4884 0.4849 0.4815 0.4780 0.4746 0.4712 0.4678 0.4645 0.4612 0.4579
1100 0.4546 0.4514 0.4482 0.4450 0.4418 0.4386 0.4355 0.4324 0.4293 0.4262
1200 0.4232 0.4202 0.4172 0.4142 0.4112 0.4083 0.4054 0.4025 0.3996 0.3968
1300 0.3939 0.3911 0.3883 0.3855 0.3828 0.3801 0.3773 0.3746 0.3720 0.3693
1400 0.3667 0.3641 0.3615 0.3589 0.3563 0.3538 0.3512 0.3487 0.3462 0.3438
1500 0.3413 0.3389 0.3365 0.3341 0.3317 0.3293 0.3270 0.3246 0.3223 0.3200
1600 0.3177 0.3154 0.3132 0.3110 0.3087 0.3065 0.3043 0.3022 0.3000 0.2979
1700 0.2957 0.2936 0.2915 0.2895 0.2874 0.2853 0.2833 0.2813 0.2793 0.2773
1800 0.2753 0.2733 0.2714 0.2694 0.2675 0.2656 0.2637 0.2618 0.2600 0.2581
1900 0.2563 0.2544 0.2526 0.2508 0.2490 0.2472 0.2455 0.2437 0.2420 0.2403
139Ce (Cerium-139 / Ce-139) Half-life: 137.641 days

days 0 2 4 6 8 10 12 14 16 18
0 1.0000 0.9900 0.9801 0.9702 0.9605 0.9509 0.9414 0.9319 0.9226 0.9133
20 0.9042 0.8951 0.8862 0.8773 0.8685 0.8598 0.8512 0.8426 0.8342 0.8258
40 0.8176 0.8094 0.8013 0.7932 0.7853 0.7774 0.7696 0.7619 0.7543 0.7467
60 0.7392 0.7318 0.7245 0.7172 0.7100 0.7029 0.6959 0.6889 0.6820 0.6752
80 0.6684 0.6617 0.6551 0.6485 0.6420 0.6356 0.6292 0.6229 0.6167 0.6105
100 0.6044 0.5983 0.5923 0.5864 0.5805 0.5747 0.5689 0.5632 0.5576 0.5520
120 0.5465 0.5410 0.5356 0.5302 0.5249 0.5196 0.5144 0.5093 0.5041 0.4991
140 0.4941 0.4891 0.4842 0.4794 0.4746 0.4698 0.4651 0.4605 0.4558 0.4513
160 0.4468 0.4423 0.4378 0.4335 0.4291 0.4248 0.4206 0.4163 0.4122 0.4080
180 0.4039 0.3999 0.3959 0.3919 0.3880 0.3841 0.3803 0.3765 0.3727 0.3689
200 0.3652 0.3616 0.3580 0.3544 0.3508 0.3473 0.3438 0.3404 0.3370 0.3336
220 0.3303 0.3269 0.3237 0.3204 0.3172 0.3140 0.3109 0.3078 0.3047 0.3016
240 0.2986 0.2956 0.2927 0.2897 0.2868 0.2839 0.2811 0.2783 0.2755 0.2727
260 0.2700 0.2673 0.2646 0.2620 0.2593 0.2567 0.2542 0.2516 0.2491 0.2466
280 0.2441 0.2417 0.2393 0.2369 0.2345 0.2321 0.2298 0.2275 0.2252 0.2230
300 0.2207 0.2185 0.2163 0.2142 0.2120 0.2099 0.2078 0.2057 0.2036 0.2016
320 0.1996 0.1976 0.1956 0.1936 0.1917 0.1898 0.1879 0.1860 0.1841 0.1823
340 0.1805 0.1787 0.1769 0.1751 0.1733 0.1716 0.1699 0.1682 0.1665 0.1648
360 0.1632 0.1615 0.1599 0.1583 0.1567 0.1552 0.1536 0.1521 0.1505 0.1490
380 0.1475 0.1461 0.1446 0.1431 0.1417 0.1403 0.1389 0.1375 0.1361 0.1348
134Cs (Point gamma standard spectrometry sources set / "OSGI-R"-set: Cesium-134 / Cs-134) Half-life: 2.0648 years **

days 0 10 20 30 40 50 60 70 80 90
0 1.0000 0.9908 0.9818 0.9728 0.9639 0.9551 0.9463 0.9377 0.9291 0.9206
100 0.9121 0.9038 0.8955 0.8873 0.8792 0.8711 0.8632 0.8553 0.8474 0.8397
200 0.8320 0.8244 0.8168 0.8094 0.8019 0.7946 0.7873 0.7801 0.7730 0.7659
300 0.7589 0.7519 0.7451 0.7382 0.7315 0.7248 0.7182 0.7116 0.7051 0.6986
400 0.6922 0.6859 0.6796 0.6734 0.6672 0.6611 0.6551 0.6491 0.6431 0.6372
500 0.6314 0.6256 0.6199 0.6142 0.6086 0.6030 0.5975 0.5920 0.5866 0.5812
600 0.5759 0.5707 0.5654 0.5603 0.5551 0.5500 0.5450 0.5400 0.5351 0.5302
700 0.5253 0.5205 0.5157 0.5110 0.5063 0.5017 0.4971 0.4926 0.4881 0.4836
800 0.4792 0.4748 0.4704 0.4661 0.4619 0.4576 0.4534 0.4493 0.4452 0.4411
900 0.4371 0.4331 0.4291 0.4252 0.4213 0.4174 0.4136 0.4098 0.4061 0.4023
1000 0.3987 0.3950 0.3914 0.3878 0.3843 0.3807 0.3773 0.3738 0.3704 0.3670
1100 0.3636 0.3603 0.3570 0.3537 0.3505 0.3473 0.3441 0.3410 0.3378 0.3348
1200 0.3317 0.3287 0.3256 0.3227 0.3197 0.3168 0.3139 0.3110 0.3082 0.3053
1300 0.3025 0.2998 0.2970 0.2943 0.2916 0.2889 0.2863 0.2837 0.2811 0.2785
1400 0.2760 0.2734 0.2709 0.2685 0.2660 0.2636 0.2611 0.2588 0.2564 0.2540
1500 0.2517 0.2494 0.2471 0.2449 0.2426 0.2404 0.2382 0.2360 0.2339 0.2317
1600 0.2296 0.2275 0.2254 0.2234 0.2213 0.2193 0.2173 0.2153 0.2133 0.2114
1700 0.2094 0.2075 0.2056 0.2037 0.2019 0.2000 0.1982 0.1964 0.1946 0.1928
1800 0.1910 0.1893 0.1875 0.1858 0.1841 0.1824 0.1808 0.1791 0.1775 0.1759
1900 0.1742 0.1726 0.1711 0.1695 0.1680 0.1664 0.1649 0.1634 0.1619 0.1604
137Cs (Cesium-137 / Cs-137) Half-life: 30.018 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9981 0.9962 0.9942 0.9923 0.9904 0.9885 0.9866 0.9847 0.9828 0.9809 0.9791
1 0.9772 0.9753 0.9734 0.9715 0.9697 0.9678 0.9660 0.9641 0.9622 0.9604 0.9585 0.9567
2 0.9549 0.9530 0.9512 0.9494 0.9475 0.9457 0.9439 0.9421 0.9403 0.9385 0.9367 0.9349
3 0.9331 0.9313 0.9295 0.9277 0.9259 0.9241 0.9224 0.9206 0.9188 0.9171 0.9153 0.9135
4 0.9118 0.9100 0.9083 0.9065 0.9048 0.9030 0.9013 0.8996 0.8978 0.8961 0.8944 0.8927
5 0.8910 0.8892 0.8875 0.8858 0.8841 0.8824 0.8807 0.8790 0.8773 0.8757 0.8740 0.8723
6 0.8706 0.8689 0.8673 0.8656 0.8639 0.8623 0.8606 0.8590 0.8573 0.8557 0.8540 0.8524
7 0.8507 0.8491 0.8475 0.8459 0.8442 0.8426 0.8410 0.8394 0.8378 0.8361 0.8345 0.8329
8 0.8313 0.8297 0.8281 0.8265 0.8250 0.8234 0.8218 0.8202 0.8186 0.8171 0.8155 0.8139
9 0.8124 0.8108 0.8092 0.8077 0.8061 0.8046 0.8030 0.8015 0.7999 0.7984 0.7969 0.7953
10 0.7938 0.7923 0.7908 0.7892 0.7877 0.7862 0.7847 0.7832 0.7817 0.7802 0.7787 0.7772
11 0.7757 0.7742 0.7727 0.7712 0.7697 0.7683 0.7668 0.7653 0.7638 0.7624 0.7609 0.7594
12 0.7580 0.7565 0.7551 0.7536 0.7522 0.7507 0.7493 0.7478 0.7464 0.7450 0.7435 0.7421
13 0.7407 0.7393 0.7378 0.7364 0.7350 0.7336 0.7322 0.7308 0.7294 0.7280 0.7266 0.7252
14 0.7238 0.7224 0.7210 0.7196 0.7182 0.7168 0.7155 0.7141 0.7127 0.7113 0.7100 0.7086
15 0.7073 0.7059 0.7045 0.7032 0.7018 0.7005 0.6991 0.6978 0.6964 0.6951 0.6938 0.6924
16 0.6911 0.6898 0.6885 0.6871 0.6858 0.6845 0.6832 0.6819 0.6806 0.6792 0.6779 0.6766
17 0.6753 0.6740 0.6727 0.6714 0.6702 0.6689 0.6676 0.6663 0.6650 0.6637 0.6625 0.6612
18 0.6599 0.6586 0.6574 0.6561 0.6549 0.6536 0.6523 0.6511 0.6498 0.6486 0.6473 0.6461
19 0.6449 0.6436 0.6424 0.6411 0.6399 0.6387 0.6375 0.6362 0.6350 0.6338 0.6326 0.6313
57Сo (Cobalt-57 / Co-57) Half-life: 271.8 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9873 0.9748 0.9625 0.9503 0.9382 0.9263 0.9146 0.9030 0.8916
50 0.8803 0.8691 0.8581 0.8472 0.8365 0.8259 0.8154 0.8051 0.7949 0.7848
100 0.7749 0.7651 0.7554 0.7458 0.7364 0.7270 0.7178 0.7087 0.6998 0.6909
150 0.6821 0.6735 0.6650 0.6565 0.6482 0.6400 0.6319 0.6239 0.6160 0.6082
200 0.6005 0.5929 0.5853 0.5779 0.5706 0.5634 0.5562 0.5492 0.5422 0.5354
250 0.5286 0.5219 0.5153 0.5087 0.5023 0.4959 0.4897 0.4834 0.4773 0.4713
300 0.4653 0.4594 0.4536 0.4478 0.4422 0.4366 0.4310 0.4256 0.4202 0.4149
350 0.4096 0.4044 0.3993 0.3942 0.3892 0.3843 0.3794 0.3746 0.3699 0.3652
400 0.3606 0.3560 0.3515 0.3470 0.3426 0.3383 0.3340 0.3298 0.3256 0.3215
450 0.3174 0.3134 0.3094 0.3055 0.3016 0.2978 0.2940 0.2903 0.2866 0.2830
500 0.2794 0.2759 0.2724 0.2689 0.2655 0.2621 0.2588 0.2555 0.2523 0.2491
550 0.2460 0.2428 0.2398 0.2367 0.2337 0.2308 0.2278 0.2249 0.2221 0.2193
600 0.2165 0.2138 0.2111 0.2084 0.2057 0.2031 0.2006 0.1980 0.1955 0.1930
650 0.1906 0.1882 0.1858 0.1834 0.1811 0.1788 0.1766 0.1743 0.1721 0.1699
700 0.1678 0.1656 0.1635 0.1615 0.1594 0.1574 0.1554 0.1534 0.1515 0.1496
750 0.1477 0.1458 0.1440 0.1421 0.1403 0.1386 0.1368 0.1351 0.1334 0.1317
800 0.1300 0.1284 0.1267 0.1251 0.1235 0.1220 0.1204 0.1189 0.1174 0.1159
850 0.1144 0.1130 0.1116 0.1101 0.1088 0.1074 0.1060 0.1047 0.1033 0.1020
900 0.1007 0.0995 0.0982 0.0970 0.0957 0.0945 0.0933 0.0921 0.0910 0.0898
950 0.0887 0.0876 0.0864 0.0854 0.0843 0.0832 0.0821 0.0811 0.0801 0.0791
60Co (Cobalt-60 / Co-60) Half-life: 5.271 years *

year\month 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
0 1.0000 0.9945 0.9891 0.9837 0.9783 0.9730 0.9677 0.9624 0.9571 0.9519 0.9467 0.9415
0.5 0.9364 0.9312 0.9262 0.9211 0.9161 0.9111 0.9061 0.9011 0.8962 0.8913 0.8864 0.8816
1 0.8768 0.8720 0.8672 0.8625 0.8578 0.8531 0.8484 0.8438 0.8392 0.8346 0.8300 0.8255
1.5 0.8210 0.8165 0.8120 0.8076 0.8032 0.7988 0.7944 0.7901 0.7858 0.7815 0.7772 0.7730
2 0.7687 0.7645 0.7604 0.7562 0.7521 0.7480 0.7439 0.7398 0.7358 0.7317 0.7277 0.7238
2.5 0.7198 0.7159 0.7120 0.7081 0.7042 0.7004 0.6965 0.6927 0.6889 0.6852 0.6814 0.6777
3 0.6740 0.6703 0.6667 0.6630 0.6594 0.6558 0.6522 0.6486 0.6451 0.6416 0.6381 0.6346
3.5 0.6311 0.6277 0.6242 0.6208 0.6174 0.6141 0.6107 0.6074 0.6041 0.6008 0.5975 0.5942
4 0.5910 0.5877 0.5845 0.5813 0.5781 0.5750 0.5718 0.5687 0.5656 0.5625 0.5594 0.5564
4.5 0.5534 0.5503 0.5473 0.5443 0.5414 0.5384 0.5355 0.5325 0.5296 0.5267 0.5238 0.5210
5 0.5181 0.5153 0.5125 0.5097 0.5069 0.5041 0.5014 0.4986 0.4959 0.4932 0.4905 0.4878
5.5 0.4852 0.4825 0.4799 0.4773 0.4746 0.4721 0.4695 0.4669 0.4644 0.4618 0.4593 0.4568
6 0.4543 0.4518 0.4493 0.4469 0.4444 0.4420 0.4396 0.4372 0.4348 0.4324 0.4301 0.4277
6.5 0.4254 0.4231 0.4207 0.4184 0.4162 0.4139 0.4116 0.4094 0.4071 0.4049 0.4027 0.4005
7 0.3983 0.3961 0.3940 0.3918 0.3897 0.3875 0.3854 0.3833 0.3812 0.3791 0.3771 0.3750
7.5 0.3730 0.3709 0.3689 0.3669 0.3649 0.3629 0.3609 0.3589 0.3570 0.3550 0.3531 0.3512
8 0.3492 0.3473 0.3454 0.3435 0.3417 0.3398 0.3379 0.3361 0.3343 0.3324 0.3306 0.3288
8.5 0.3270 0.3252 0.3234 0.3217 0.3199 0.3182 0.3164 0.3147 0.3130 0.3113 0.3096 0.3079
9 0.3062 0.3045 0.3029 0.3012 0.2996 0.2979 0.2963 0.2947 0.2931 0.2915 0.2899 0.2883
9.5 0.2867 0.2851 0.2836 0.2820 0.2805 0.2790 0.2774 0.2759 0.2744 0.2729 0.2714 0.2699
244Cm (Curium-244 / Cu-244) Half-life: 18.11 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9968 0.9936 0.9905 0.9873 0.9842 0.9810 0.9779 0.9748 0.9717 0.9686 0.9655
1 0.9624 0.9594 0.9563 0.9533 0.9502 0.9472 0.9442 0.9412 0.9382 0.9352 0.9322 0.9293
2 0.9263 0.9234 0.9204 0.9175 0.9146 0.9117 0.9087 0.9059 0.9030 0.9001 0.8972 0.8944
3 0.8915 0.8887 0.8859 0.8830 0.8802 0.8774 0.8746 0.8718 0.8691 0.8663 0.8635 0.8608
4 0.8580 0.8553 0.8526 0.8499 0.8472 0.8445 0.8418 0.8391 0.8364 0.8338 0.8311 0.8285
5 0.8258 0.8232 0.8206 0.8180 0.8154 0.8128 0.8102 0.8076 0.8050 0.8025 0.7999 0.7974
6 0.7948 0.7923 0.7898 0.7872 0.7847 0.7822 0.7797 0.7773 0.7748 0.7723 0.7699 0.7674
7 0.7650 0.7625 0.7601 0.7577 0.7553 0.7529 0.7505 0.7481 0.7457 0.7433 0.7410 0.7386
8 0.7362 0.7339 0.7316 0.7292 0.7269 0.7246 0.7223 0.7200 0.7177 0.7154 0.7131 0.7109
9 0.7086 0.7063 0.7041 0.7018 0.6996 0.6974 0.6952 0.6930 0.6907 0.6885 0.6864 0.6842
10 0.6820 0.6798 0.6777 0.6755 0.6733 0.6712 0.6691 0.6669 0.6648 0.6627 0.6606 0.6585
11 0.6564 0.6543 0.6522 0.6501 0.6481 0.6460 0.6439 0.6419 0.6398 0.6378 0.6358 0.6337
12 0.6317 0.6297 0.6277 0.6257 0.6237 0.6217 0.6198 0.6178 0.6158 0.6139 0.6119 0.6100
13 0.6080 0.6061 0.6041 0.6022 0.6003 0.5984 0.5965 0.5946 0.5927 0.5908 0.5889 0.5870
14 0.5852 0.5833 0.5815 0.5796 0.5778 0.5759 0.5741 0.5723 0.5704 0.5686 0.5668 0.5650
15 0.5632 0.5614 0.5596 0.5578 0.5561 0.5543 0.5525 0.5508 0.5490 0.5473 0.5455 0.5438
16 0.5421 0.5403 0.5386 0.5369 0.5352 0.5335 0.5318 0.5301 0.5284 0.5267 0.5250 0.5234
17 0.5217 0.5200 0.5184 0.5167 0.5151 0.5134 0.5118 0.5102 0.5086 0.5069 0.5053 0.5037
18 0.5021 0.5005 0.4989 0.4973 0.4957 0.4942 0.4926 0.4910 0.4895 0.4879 0.4863 0.4848
19 0.4833 0.4817 0.4802 0.4787 0.4771 0.4756 0.4741 0.4726 0.4711 0.4696 0.4681 0.4666
152Eu (Point gamma standard spectrometry sources set / "OSGI-R"-set: Europium-152 / Eu-152) Half-life: 13.516 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9957 0.9915 0.9873 0.9831 0.9789 0.9747 0.9705 0.9664 0.9623 0.9582 0.9541
1 0.9500 0.9460 0.9419 0.9379 0.9339 0.9299 0.9260 0.9220 0.9181 0.9142 0.9103 0.9064
2 0.9025 0.8987 0.8948 0.8910 0.8872 0.8834 0.8797 0.8759 0.8722 0.8685 0.8648 0.8611
3 0.8574 0.8537 0.8501 0.8465 0.8429 0.8393 0.8357 0.8321 0.8286 0.8250 0.8215 0.8180
4 0.8145 0.8111 0.8076 0.8042 0.8007 0.7973 0.7939 0.7905 0.7872 0.7838 0.7805 0.7771
5 0.7738 0.7705 0.7672 0.7640 0.7607 0.7575 0.7542 0.7510 0.7478 0.7446 0.7414 0.7383
6 0.7351 0.7320 0.7289 0.7258 0.7227 0.7196 0.7165 0.7135 0.7104 0.7074 0.7044 0.7014
7 0.6984 0.6954 0.6924 0.6895 0.6865 0.6836 0.6807 0.6778 0.6749 0.6720 0.6692 0.6663
8 0.6635 0.6606 0.6578 0.6550 0.6522 0.6494 0.6467 0.6439 0.6412 0.6384 0.6357 0.6330
9 0.6303 0.6276 0.6249 0.6223 0.6196 0.6170 0.6143 0.6117 0.6091 0.6065 0.6039 0.6014
10 0.5988 0.5962 0.5937 0.5912 0.5886 0.5861 0.5836 0.5811 0.5787 0.5762 0.5737 0.5713
11 0.5689 0.5664 0.5640 0.5616 0.5592 0.5568 0.5545 0.5521 0.5497 0.5474 0.5451 0.5427
12 0.5404 0.5381 0.5358 0.5335 0.5313 0.5290 0.5267 0.5245 0.5223 0.5200 0.5178 0.5156
13 0.5134 0.5112 0.5090 0.5069 0.5047 0.5026 0.5004 0.4983 0.4962 0.4940 0.4919 0.4898
14 0.4877 0.4857 0.4836 0.4815 0.4795 0.4774 0.4754 0.4734 0.4713 0.4693 0.4673 0.4653
15 0.4634 0.4614 0.4594 0.4575 0.4555 0.4536 0.4516 0.4497 0.4478 0.4459 0.4440 0.4421
16 0.4402 0.4383 0.4364 0.4346 0.4327 0.4309 0.4291 0.4272 0.4254 0.4236 0.4218 0.4200
17 0.4182 0.4164 0.4146 0.4129 0.4111 0.4093 0.4076 0.4059 0.4041 0.4024 0.4007 0.3990
18 0.3973 0.3956 0.3939 0.3922 0.3905 0.3889 0.3872 0.3856 0.3839 0.3823 0.3807 0.3790
19 0.3774 0.3758 0.3742 0.3726 0.3710 0.3694 0.3679 0.3663 0.3647 0.3632 0.3616 0.3601
153Gd (Point gamma standard spectrometry sources set / "OSGI-R"-set: Gadolinium-153 / Gd-153) Half-life: 240.4 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9857 0.9716 0.9577 0.9440 0.9305 0.9171 0.9040 0.8911 0.8783
50 0.8657 0.8534 0.8411 0.8291 0.8172 0.8055 0.7940 0.7826 0.7714 0.7604
100 0.7495 0.7388 0.7282 0.7178 0.7075 0.6974 0.6874 0.6776 0.6679 0.6583
150 0.6489 0.6396 0.6304 0.6214 0.6125 0.6038 0.5951 0.5866 0.5782 0.5699
200 0.5618 0.5537 0.5458 0.5380 0.5303 0.5227 0.5152 0.5078 0.5006 0.4934
250 0.4863 0.4794 0.4725 0.4658 0.4591 0.4525 0.4460 0.4397 0.4334 0.4272
300 0.4211 0.4150 0.4091 0.4032 0.3975 0.3918 0.3862 0.3806 0.3752 0.3698
350 0.3645 0.3593 0.3542 0.3491 0.3441 0.3392 0.3343 0.3295 0.3248 0.3202
400 0.3156 0.3111 0.3066 0.3022 0.2979 0.2936 0.2894 0.2853 0.2812 0.2772
450 0.2732 0.2693 0.2655 0.2617 0.2579 0.2542 0.2506 0.2470 0.2435 0.2400
500 0.2365 0.2331 0.2298 0.2265 0.2233 0.2201 0.2169 0.2138 0.2108 0.2078
550 0.2048 0.2018 0.1990 0.1961 0.1933 0.1905 0.1878 0.1851 0.1825 0.1799
600 0.1773 0.1747 0.1722 0.1698 0.1674 0.1650 0.1626 0.1603 0.1580 0.1557
650 0.1535 0.1513 0.1491 0.1470 0.1449 0.1428 0.1408 0.1388 0.1368 0.1348
700 0.1329 0.1310 0.1291 0.1273 0.1254 0.1236 0.1219 0.1201 0.1184 0.1167
750 0.1150 0.1134 0.1118 0.1102 0.1086 0.1070 0.1055 0.1040 0.1025 0.1010
800 0.0996 0.0982 0.0968 0.0954 0.0940 0.0927 0.0913 0.0900 0.0887 0.0875
850 0.0862 0.0850 0.0838 0.0826 0.0814 0.0802 0.0791 0.0779 0.0768 0.0757
900 0.0746 0.0736 0.0725 0.0715 0.0705 0.0695 0.0685 0.0675 0.0665 0.0656
950 0.0646 0.0637 0.0628 0.0619 0.0610 0.0601 0.0593 0.0584 0.0576 0.0568
124I (Iodine-124 / I-124) Half-life: 4.176 days

hours 0 1 2 3 4 5 6 7 8 9
0 1.0000 0.9931 0.9863 0.9795 0.9727 0.9660 0.9594 0.9527 0.9462 0.9397
10 0.9332 0.9267 0.9204 0.9140 0.9077 0.9015 0.8952 0.8891 0.8829 0.8769
20 0.8708 0.8648 0.8589 0.8529 0.8471 0.8412 0.8354 0.8297 0.8239 0.8183
30 0.8126 0.8070 0.8015 0.7959 0.7905 0.7850 0.7796 0.7742 0.7689 0.7636
40 0.7583 0.7531 0.7479 0.7428 0.7376 0.7326 0.7275 0.7225 0.7175 0.7126
50 0.7077 0.7028 0.6979 0.6931 0.6883 0.6836 0.6789 0.6742 0.6696 0.6649
60 0.6604 0.6558 0.6513 0.6468 0.6423 0.6379 0.6335 0.6292 0.6248 0.6205
70 0.6162 0.6120 0.6078 0.6036 0.5994 0.5953 0.5912 0.5871 0.5831 0.5791
80 0.5751 0.5711 0.5672 0.5633 0.5594 0.5555 0.5517 0.5479 0.5441 0.5404
90 0.5366 0.5329 0.5293 0.5256 0.5220 0.5184 0.5148 0.5113 0.5077 0.5042
100 0.5008 0.4973 0.4939 0.4905 0.4871 0.4838 0.4804 0.4771 0.4738 0.4706
110 0.4673 0.4641 0.4609 0.4577 0.4546 0.4514 0.4483 0.4452 0.4422 0.4391
120 0.4361 0.4331 0.4301 0.4271 0.4242 0.4213 0.4184 0.4155 0.4126 0.4098
130 0.4069 0.4041 0.4014 0.3986 0.3958 0.3931 0.3904 0.3877 0.3850 0.3824
140 0.3798 0.3771 0.3745 0.3720 0.3694 0.3668 0.3643 0.3618 0.3593 0.3568
150 0.3544 0.3519 0.3495 0.3471 0.3447 0.3423 0.3400 0.3376 0.3353 0.3330
160 0.3307 0.3284 0.3262 0.3239 0.3217 0.3195 0.3173 0.3151 0.3129 0.3107
170 0.3086 0.3065 0.3044 0.3023 0.3002 0.2981 0.2961 0.2940 0.2920 0.2900
180 0.2880 0.2860 0.2840 0.2821 0.2801 0.2782 0.2763 0.2744 0.2725 0.2706
190 0.2687 0.2669 0.2650 0.2632 0.2614 0.2596 0.2578 0.2560 0.2543 0.2525
125I (Iodine-125 / I-125) Half-life: 59.407 days

days 0 1 2 3 4 5 6 7 8 9
0 1.0000 0.9884 0.9769 0.9656 0.9544 0.9433 0.9324 0.9216 0.9109 0.9003
10 0.8899 0.8795 0.8693 0.8593 0.8493 0.8394 0.8297 0.8201 0.8106 0.8012
20 0.7919 0.7827 0.7736 0.7646 0.7558 0.7470 0.7383 0.7298 0.7213 0.7129
30 0.7047 0.6965 0.6884 0.6804 0.6725 0.6647 0.6570 0.6494 0.6419 0.6344
40 0.6271 0.6198 0.6126 0.6055 0.5985 0.5915 0.5847 0.5779 0.5712 0.5646
50 0.5580 0.5515 0.5451 0.5388 0.5326 0.5264 0.5203 0.5142 0.5083 0.5024
60 0.4966 0.4908 0.4851 0.4795 0.4739 0.4684 0.4630 0.4576 0.4523 0.4471
70 0.4419 0.4367 0.4317 0.4267 0.4217 0.4168 0.4120 0.4072 0.4025 0.3978
80 0.3932 0.3886 0.3841 0.3797 0.3753 0.3709 0.3666 0.3624 0.3582 0.3540
90 0.3499 0.3458 0.3418 0.3379 0.3339 0.3301 0.3262 0.3225 0.3187 0.3150
100 0.3114 0.3078 0.3042 0.3007 0.2972 0.2937 0.2903 0.2869 0.2836 0.2803
110 0.2771 0.2739 0.2707 0.2675 0.2644 0.2614 0.2583 0.2553 0.2524 0.2495
120 0.2466 0.2437 0.2409 0.2381 0.2353 0.2326 0.2299 0.2272 0.2246 0.2220
130 0.2194 0.2169 0.2143 0.2119 0.2094 0.2070 0.2046 0.2022 0.1999 0.1975
140 0.1952 0.1930 0.1907 0.1885 0.1863 0.1842 0.1820 0.1799 0.1778 0.1758
150 0.1737 0.1717 0.1697 0.1678 0.1658 0.1639 0.1620 0.1601 0.1583 0.1564
160 0.1546 0.1528 0.1510 0.1493 0.1476 0.1458 0.1442 0.1425 0.1408 0.1392
170 0.1376 0.1360 0.1344 0.1329 0.1313 0.1298 0.1283 0.1268 0.1253 0.1239
180 0.1224 0.1210 0.1196 0.1182 0.1168 0.1155 0.1142 0.1128 0.1115 0.1102
190 0.1089 0.1077 0.1064 0.1052 0.1040 0.1028 0.1016 0.1004 0.0992 0.0981
55Fe (Iron-55 / Fe-55) Half-life: 2.741 years **

days 0 10 20 30 40 50 60 70 80 90
0 1.0000 0.9931 0.9862 0.9794 0.9727 0.9660 0.9593 0.9527 0.9461 0.9395
100 0.9331 0.9266 0.9202 0.9139 0.9076 0.9013 0.8951 0.8889 0.8828 0.8767
200 0.8706 0.8646 0.8586 0.8527 0.8468 0.8410 0.8352 0.8294 0.8237 0.8180
300 0.8123 0.8067 0.8012 0.7956 0.7901 0.7847 0.7793 0.7739 0.7685 0.7632
400 0.7580 0.7527 0.7475 0.7424 0.7372 0.7321 0.7271 0.7221 0.7171 0.7121
500 0.7072 0.7023 0.6975 0.6927 0.6879 0.6831 0.6784 0.6737 0.6691 0.6645
600 0.6599 0.6553 0.6508 0.6463 0.6418 0.6374 0.6330 0.6286 0.6243 0.6200
700 0.6157 0.6115 0.6072 0.6030 0.5989 0.5947 0.5906 0.5866 0.5825 0.5785
800 0.5745 0.5705 0.5666 0.5627 0.5588 0.5549 0.5511 0.5473 0.5435 0.5398
900 0.5360 0.5323 0.5287 0.5250 0.5214 0.5178 0.5142 0.5107 0.5071 0.5036
1000 0.5002 0.4967 0.4933 0.4899 0.4865 0.4831 0.4798 0.4765 0.4732 0.4699
1100 0.4667 0.4635 0.4603 0.4571 0.4539 0.4508 0.4477 0.4446 0.4415 0.4385
1200 0.4354 0.4324 0.4295 0.4265 0.4235 0.4206 0.4177 0.4148 0.4120 0.4091
1300 0.4063 0.4035 0.4007 0.3979 0.3952 0.3925 0.3898 0.3871 0.3844 0.3817
1400 0.3791 0.3765 0.3739 0.3713 0.3687 0.3662 0.3637 0.3612 0.3587 0.3562
1500 0.3537 0.3513 0.3489 0.3464 0.3441 0.3417 0.3393 0.3370 0.3347 0.3323
1600 0.3300 0.3278 0.3255 0.3233 0.3210 0.3188 0.3166 0.3144 0.3123 0.3101
1700 0.3080 0.3058 0.3037 0.3016 0.2995 0.2975 0.2954 0.2934 0.2913 0.2893
1800 0.2873 0.2854 0.2834 0.2814 0.2795 0.2776 0.2756 0.2737 0.2718 0.2700
1900 0.2681 0.2663 0.2644 0.2626 0.2608 0.2590 0.2572 0.2554 0.2537 0.2519
85Kr (Krypton-85 / Kr-85) Half-life: 10.758 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9946 0.9893 0.9840 0.9788 0.9735 0.9683 0.9631 0.9580 0.9528 0.9477 0.9426
1 0.9376 0.9326 0.9276 0.9226 0.9177 0.9128 0.9079 0.9030 0.8982 0.8934 0.8886 0.8838
2 0.8791 0.8744 0.8697 0.8650 0.8604 0.8558 0.8512 0.8467 0.8421 0.8376 0.8331 0.8287
3 0.8242 0.8198 0.8154 0.8111 0.8067 0.8024 0.7981 0.7938 0.7896 0.7854 0.7812 0.7770
4 0.7728 0.7687 0.7646 0.7605 0.7564 0.7523 0.7483 0.7443 0.7403 0.7364 0.7324 0.7285
5 0.7246 0.7207 0.7168 0.7130 0.7092 0.7054 0.7016 0.6979 0.6941 0.6904 0.6867 0.6830
6 0.6794 0.6757 0.6721 0.6685 0.6649 0.6614 0.6578 0.6543 0.6508 0.6473 0.6439 0.6404
7 0.6370 0.6336 0.6302 0.6268 0.6234 0.6201 0.6168 0.6135 0.6102 0.6069 0.6037 0.6004
8 0.5972 0.5940 0.5909 0.5877 0.5845 0.5814 0.5783 0.5752 0.5721 0.5691 0.5660 0.5630
9 0.5600 0.5570 0.5540 0.5510 0.5481 0.5451 0.5422 0.5393 0.5364 0.5335 0.5307 0.5279
10 0.5250 0.5222 0.5194 0.5166 0.5139 0.5111 0.5084 0.5057 0.5029 0.5003 0.4976 0.4949
11 0.4923 0.4896 0.4870 0.4844 0.4818 0.4792 0.4767 0.4741 0.4716 0.4690 0.4665 0.4640
12 0.4615 0.4591 0.4566 0.4542 0.4517 0.4493 0.4469 0.4445 0.4421 0.4398 0.4374 0.4351
13 0.4327 0.4304 0.4281 0.4258 0.4236 0.4213 0.4190 0.4168 0.4146 0.4123 0.4101 0.4079
14 0.4057 0.4036 0.4014 0.3993 0.3971 0.3950 0.3929 0.3908 0.3887 0.3866 0.3845 0.3825
15 0.3804 0.3784 0.3764 0.3743 0.3723 0.3703 0.3684 0.3664 0.3644 0.3625 0.3605 0.3586
16 0.3567 0.3548 0.3529 0.3510 0.3491 0.3472 0.3454 0.3435 0.3417 0.3399 0.3380 0.3362
17 0.3344 0.3326 0.3309 0.3291 0.3273 0.3256 0.3238 0.3221 0.3204 0.3187 0.3169 0.3152
18 0.3136 0.3119 0.3102 0.3086 0.3069 0.3053 0.3036 0.3020 0.3004 0.2988 0.2972 0.2956
19 0.2940 0.2924 0.2909 0.2893 0.2877 0.2862 0.2847 0.2832 0.2816 0.2801 0.2786 0.2771
54Mn (Point gamma standard spectrometry sources set / "OSGI-R"-set: Manganese-54 / Mn-54) Half-life: 312.11 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9890 0.9780 0.9672 0.9566 0.9460 0.9355 0.9252 0.9150 0.9049
50 0.8949 0.8850 0.8752 0.8656 0.8560 0.8466 0.8372 0.8280 0.8188 0.8098
100 0.8008 0.7920 0.7833 0.7746 0.7661 0.7576 0.7492 0.7410 0.7328 0.7247
150 0.7167 0.7088 0.7009 0.6932 0.6855 0.6780 0.6705 0.6631 0.6558 0.6485
200 0.6414 0.6343 0.6273 0.6203 0.6135 0.6067 0.6000 0.5934 0.5868 0.5804
250 0.5740 0.5676 0.5613 0.5551 0.5490 0.5430 0.5370 0.5310 0.5252 0.5194
300 0.5136 0.5080 0.5023 0.4968 0.4913 0.4859 0.4805 0.4752 0.4700 0.4648
350 0.4596 0.4546 0.4496 0.4446 0.4397 0.4348 0.4300 0.4253 0.4206 0.4159
400 0.4113 0.4068 0.4023 0.3979 0.3935 0.3891 0.3848 0.3806 0.3764 0.3722
450 0.3681 0.3640 0.3600 0.3560 0.3521 0.3482 0.3444 0.3406 0.3368 0.3331
500 0.3294 0.3258 0.3222 0.3186 0.3151 0.3116 0.3082 0.3048 0.3014 0.2981
550 0.2948 0.2915 0.2883 0.2851 0.2820 0.2789 0.2758 0.2728 0.2697 0.2668
600 0.2638 0.2609 0.2580 0.2552 0.2524 0.2496 0.2468 0.2441 0.2414 0.2387
650 0.2361 0.2335 0.2309 0.2284 0.2258 0.2233 0.2209 0.2184 0.2160 0.2136
700 0.2113 0.2089 0.2066 0.2044 0.2021 0.1999 0.1977 0.1955 0.1933 0.1912
750 0.1891 0.1870 0.1849 0.1829 0.1809 0.1789 0.1769 0.1749 0.1730 0.1711
800 0.1692 0.1673 0.1655 0.1637 0.1618 0.1601 0.1583 0.1565 0.1548 0.1531
850 0.1514 0.1497 0.1481 0.1465 0.1448 0.1432 0.1417 0.1401 0.1385 0.1370
900 0.1355 0.1340 0.1325 0.1311 0.1296 0.1282 0.1268 0.1254 0.1240 0.1226
950 0.1213 0.1199 0.1186 0.1173 0.1160 0.1147 0.1134 0.1122 0.1110 0.1097
63Ni (Nickel-63 / Ni-63) Half-life: 100.1 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9994 0.9988 0.9983 0.9977 0.9971 0.9965 0.9960 0.9954 0.9948 0.9942 0.9937
1 0.9931 0.9925 0.9920 0.9914 0.9908 0.9902 0.9897 0.9891 0.9885 0.9880 0.9874 0.9868
2 0.9862 0.9857 0.9851 0.9845 0.9840 0.9834 0.9828 0.9823 0.9817 0.9811 0.9806 0.9800
3 0.9794 0.9789 0.9783 0.9777 0.9772 0.9766 0.9761 0.9755 0.9749 0.9744 0.9738 0.9732
4 0.9727 0.9721 0.9716 0.9710 0.9704 0.9699 0.9693 0.9688 0.9682 0.9676 0.9671 0.9665
5 0.9660 0.9654 0.9649 0.9643 0.9637 0.9632 0.9626 0.9621 0.9615 0.9610 0.9604 0.9599
6 0.9593 0.9588 0.9582 0.9576 0.9571 0.9565 0.9560 0.9554 0.9549 0.9543 0.9538 0.9532
7 0.9527 0.9521 0.9516 0.9510 0.9505 0.9499 0.9494 0.9488 0.9483 0.9477 0.9472 0.9467
8 0.9461 0.9456 0.9450 0.9445 0.9439 0.9434 0.9428 0.9423 0.9418 0.9412 0.9407 0.9401
9 0.9396 0.9390 0.9385 0.9380 0.9374 0.9369 0.9363 0.9358 0.9353 0.9347 0.9342 0.9336
10 0.9331 0.9326 0.9320 0.9315 0.9309 0.9304 0.9299 0.9293 0.9288 0.9283 0.9277 0.9272
11 0.9267 0.9261 0.9256 0.9251 0.9245 0.9240 0.9235 0.9229 0.9224 0.9219 0.9213 0.9208
12 0.9203 0.9197 0.9192 0.9187 0.9181 0.9176 0.9171 0.9166 0.9160 0.9155 0.9150 0.9144
13 0.9139 0.9134 0.9129 0.9123 0.9118 0.9113 0.9108 0.9102 0.9097 0.9092 0.9087 0.9081
14 0.9076 0.9071 0.9066 0.9060 0.9055 0.9050 0.9045 0.9039 0.9034 0.9029 0.9024 0.9019
15 0.9013 0.9008 0.9003 0.8998 0.8993 0.8987 0.8982 0.8977 0.8972 0.8967 0.8962 0.8956
16 0.8951 0.8946 0.8941 0.8936 0.8931 0.8925 0.8920 0.8915 0.8910 0.8905 0.8900 0.8895
17 0.8889 0.8884 0.8879 0.8874 0.8869 0.8864 0.8859 0.8854 0.8849 0.8843 0.8838 0.8833
18 0.8828 0.8823 0.8818 0.8813 0.8808 0.8803 0.8798 0.8793 0.8787 0.8782 0.8777 0.8772
19 0.8767 0.8762 0.8757 0.8752 0.8747 0.8742 0.8737 0.8732 0.8727 0.8722 0.8717 0.8712
238Pu (Plutonium-238 / Pu-238) Half-life: 87.74 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9993 0.9987 0.9980 0.9974 0.9967 0.9961 0.9954 0.9947 0.9941 0.9934 0.9928
1 0.9921 0.9915 0.9908 0.9902 0.9895 0.9889 0.9882 0.9876 0.9869 0.9863 0.9856 0.9850
2 0.9843 0.9837 0.9830 0.9824 0.9817 0.9811 0.9804 0.9798 0.9792 0.9785 0.9779 0.9772
3 0.9766 0.9759 0.9753 0.9747 0.9740 0.9734 0.9727 0.9721 0.9714 0.9708 0.9702 0.9695
4 0.9689 0.9683 0.9676 0.9670 0.9663 0.9657 0.9651 0.9644 0.9638 0.9632 0.9625 0.9619
5 0.9613 0.9606 0.9600 0.9594 0.9587 0.9581 0.9575 0.9569 0.9562 0.9556 0.9550 0.9543
6 0.9537 0.9531 0.9525 0.9518 0.9512 0.9506 0.9499 0.9493 0.9487 0.9481 0.9474 0.9468
7 0.9462 0.9456 0.9450 0.9443 0.9437 0.9431 0.9425 0.9419 0.9412 0.9406 0.9400 0.9394
8 0.9388 0.9381 0.9375 0.9369 0.9363 0.9357 0.9351 0.9344 0.9338 0.9332 0.9326 0.9320
9 0.9314 0.9308 0.9301 0.9295 0.9289 0.9283 0.9277 0.9271 0.9265 0.9259 0.9253 0.9246
10 0.9240 0.9234 0.9228 0.9222 0.9216 0.9210 0.9204 0.9198 0.9192 0.9186 0.9180 0.9174
11 0.9168 0.9162 0.9156 0.9150 0.9144 0.9138 0.9132 0.9126 0.9120 0.9114 0.9108 0.9102
12 0.9096 0.9090 0.9084 0.9078 0.9072 0.9066 0.9060 0.9054 0.9048 0.9042 0.9036 0.9030
13 0.9024 0.9018 0.9012 0.9006 0.9000 0.8994 0.8988 0.8982 0.8977 0.8971 0.8965 0.8959
14 0.8953 0.8947 0.8941 0.8935 0.8929 0.8924 0.8918 0.8912 0.8906 0.8900 0.8894 0.8888
15 0.8883 0.8877 0.8871 0.8865 0.8859 0.8853 0.8847 0.8842 0.8836 0.8830 0.8824 0.8818
16 0.8813 0.8807 0.8801 0.8795 0.8789 0.8784 0.8778 0.8772 0.8766 0.8761 0.8755 0.8749
17 0.8743 0.8738 0.8732 0.8726 0.8720 0.8715 0.8709 0.8703 0.8697 0.8692 0.8686 0.8680
18 0.8674 0.8669 0.8663 0.8657 0.8652 0.8646 0.8640 0.8635 0.8629 0.8623 0.8618 0.8612
19 0.8606 0.8601 0.8595 0.8589 0.8584 0.8578 0.8572 0.8567 0.8561 0.8555 0.8550 0.8544
147Pm (Beta standard sources / "ORIBI"-set: Prometium-147 / Pm-147) Half-life: 2.6234 years **

days 0 10 20 30 40 50 60 70 80 90
0 1.0000 0.9928 0.9856 0.9785 0.9715 0.9645 0.9575 0.9506 0.9437 0.9369
100 0.9302 0.9235 0.9168 0.9102 0.9036 0.8971 0.8906 0.8842 0.8778 0.8715
200 0.8652 0.8590 0.8528 0.8466 0.8405 0.8345 0.8284 0.8225 0.8165 0.8106
300 0.8048 0.7990 0.7932 0.7875 0.7818 0.7762 0.7706 0.7650 0.7595 0.7540
400 0.7486 0.7432 0.7378 0.7325 0.7272 0.7220 0.7168 0.7116 0.7065 0.7014
500 0.6963 0.6913 0.6863 0.6814 0.6764 0.6716 0.6667 0.6619 0.6571 0.6524
600 0.6477 0.6430 0.6384 0.6338 0.6292 0.6247 0.6202 0.6157 0.6113 0.6068
700 0.6025 0.5981 0.5938 0.5895 0.5853 0.5811 0.5769 0.5727 0.5686 0.5645
800 0.5604 0.5564 0.5523 0.5484 0.5444 0.5405 0.5366 0.5327 0.5289 0.5251
900 0.5213 0.5175 0.5138 0.5101 0.5064 0.5027 0.4991 0.4955 0.4919 0.4884
1000 0.4849 0.4814 0.4779 0.4744 0.4710 0.4676 0.4643 0.4609 0.4576 0.4543
1100 0.4510 0.4478 0.4445 0.4413 0.4381 0.4350 0.4318 0.4287 0.4256 0.4226
1200 0.4195 0.4165 0.4135 0.4105 0.4075 0.4046 0.4017 0.3988 0.3959 0.3931
1300 0.3902 0.3874 0.3846 0.3818 0.3791 0.3763 0.3736 0.3709 0.3683 0.3656
1400 0.3630 0.3604 0.3578 0.3552 0.3526 0.3501 0.3475 0.3450 0.3425 0.3401
1500 0.3376 0.3352 0.3328 0.3304 0.3280 0.3256 0.3233 0.3209 0.3186 0.3163
1600 0.3140 0.3118 0.3095 0.3073 0.3051 0.3029 0.3007 0.2985 0.2964 0.2942
1700 0.2921 0.2900 0.2879 0.2858 0.2838 0.2817 0.2797 0.2777 0.2757 0.2737
1800 0.2717 0.2698 0.2678 0.2659 0.2640 0.2621 0.2602 0.2583 0.2564 0.2546
1900 0.2527 0.2509 0.2491 0.2473 0.2455 0.2438 0.2420 0.2403 0.2385 0.2368
106Ru (Ruthenium-106 + Rhodium-106 / Ru-106) Half-life: 373.59 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9908 0.9816 0.9726 0.9636 0.9547 0.9459 0.9371 0.9285 0.9199
50 0.9114 0.9030 0.8947 0.8864 0.8782 0.8701 0.8621 0.8541 0.8462 0.8384
100 0.8307 0.8230 0.8154 0.8079 0.8004 0.7930 0.7857 0.7784 0.7712 0.7641
150 0.7571 0.7501 0.7431 0.7363 0.7295 0.7228 0.7161 0.7095 0.7029 0.6964
200 0.6900 0.6836 0.6773 0.6711 0.6649 0.6587 0.6526 0.6466 0.6406 0.6347
250 0.6289 0.6231 0.6173 0.6116 0.6060 0.6004 0.5948 0.5893 0.5839 0.5785
300 0.5731 0.5679 0.5626 0.5574 0.5523 0.5472 0.5421 0.5371 0.5322 0.5272
350 0.5224 0.5175 0.5128 0.5080 0.5033 0.4987 0.4941 0.4895 0.4850 0.4805
400 0.4761 0.4717 0.4673 0.4630 0.4587 0.4545 0.4503 0.4462 0.4420 0.4380
450 0.4339 0.4299 0.4259 0.4220 0.4181 0.4142 0.4104 0.4066 0.4029 0.3992
500 0.3955 0.3918 0.3882 0.3846 0.3811 0.3775 0.3741 0.3706 0.3672 0.3638
550 0.3604 0.3571 0.3538 0.3505 0.3473 0.3441 0.3409 0.3378 0.3346 0.3316
600 0.3285 0.3255 0.3225 0.3195 0.3165 0.3136 0.3107 0.3078 0.3050 0.3022
650 0.2994 0.2966 0.2939 0.2912 0.2885 0.2858 0.2832 0.2806 0.2780 0.2754
700 0.2729 0.2703 0.2679 0.2654 0.2629 0.2605 0.2581 0.2557 0.2534 0.2510
750 0.2487 0.2464 0.2441 0.2419 0.2396 0.2374 0.2352 0.2331 0.2309 0.2288
800 0.2267 0.2246 0.2225 0.2204 0.2184 0.2164 0.2144 0.2124 0.2104 0.2085
850 0.2066 0.2047 0.2028 0.2009 0.1991 0.1972 0.1954 0.1936 0.1918 0.1900
900 0.1883 0.1865 0.1848 0.1831 0.1814 0.1797 0.1781 0.1764 0.1748 0.1732
950 0.1716 0.1700 0.1684 0.1669 0.1653 0.1638 0.1623 0.1608 0.1593 0.1579
22Na (Point gamma standard spectrometry sources set / "OSGI-R"-set: Sodium-22 / Na-22) Half-life: 2.6027 years **

days 0 10 20 30 40 50 60 70 80 90
0 1.0000 0.9927 0.9855 0.9783 0.9712 0.9642 0.9572 0.9502 0.9433 0.9364
100 0.9296 0.9229 0.9162 0.9095 0.9029 0.8963 0.8898 0.8833 0.8769 0.8705
200 0.8642 0.8579 0.8517 0.8455 0.8394 0.8333 0.8272 0.8212 0.8152 0.8093
300 0.8034 0.7976 0.7918 0.7860 0.7803 0.7746 0.7690 0.7634 0.7579 0.7523
400 0.7469 0.7414 0.7361 0.7307 0.7254 0.7201 0.7149 0.7097 0.7045 0.6994
500 0.6943 0.6893 0.6843 0.6793 0.6743 0.6694 0.6646 0.6597 0.6550 0.6502
600 0.6455 0.6408 0.6361 0.6315 0.6269 0.6223 0.6178 0.6133 0.6089 0.6044
700 0.6000 0.5957 0.5914 0.5871 0.5828 0.5785 0.5743 0.5702 0.5660 0.5619
800 0.5578 0.5538 0.5497 0.5457 0.5418 0.5378 0.5339 0.5300 0.5262 0.5224
900 0.5186 0.5148 0.5111 0.5073 0.5037 0.5000 0.4964 0.4927 0.4892 0.4856
1000 0.4821 0.4786 0.4751 0.4716 0.4682 0.4648 0.4614 0.4581 0.4547 0.4514
1100 0.4482 0.4449 0.4417 0.4385 0.4353 0.4321 0.4290 0.4258 0.4227 0.4197
1200 0.4166 0.4136 0.4106 0.4076 0.4046 0.4017 0.3988 0.3959 0.3930 0.3901
1300 0.3873 0.3845 0.3817 0.3789 0.3762 0.3734 0.3707 0.3680 0.3653 0.3627
1400 0.3601 0.3574 0.3548 0.3523 0.3497 0.3472 0.3446 0.3421 0.3396 0.3372
1500 0.3347 0.3323 0.3299 0.3275 0.3251 0.3227 0.3204 0.3181 0.3157 0.3134
1600 0.3112 0.3089 0.3067 0.3044 0.3022 0.3000 0.2978 0.2957 0.2935 0.2914
1700 0.2893 0.2872 0.2851 0.2830 0.2810 0.2789 0.2769 0.2749 0.2729 0.2709
1800 0.2689 0.2670 0.2650 0.2631 0.2612 0.2593 0.2574 0.2555 0.2537 0.2518
1900 0.2500 0.2482 0.2464 0.2446 0.2428 0.2410 0.2393 0.2375 0.2358 0.2341
85Sr (Strontium-85 / Sr-85) Half-life: 64.85 days

days 0 1 2 3 4 5 6 7 8 9
0 1.0000 0.9894 0.9788 0.9684 0.9581 0.9480 0.9379 0.9279 0.9180 0.9083
10 0.8986 0.8891 0.8796 0.8703 0.8610 0.8519 0.8428 0.8338 0.8250 0.8162
20 0.8075 0.7989 0.7905 0.7821 0.7737 0.7655 0.7574 0.7493 0.7414 0.7335
30 0.7257 0.7180 0.7103 0.7028 0.6953 0.6879 0.6806 0.6734 0.6662 0.6591
40 0.6521 0.6452 0.6383 0.6315 0.6248 0.6182 0.6116 0.6051 0.5987 0.5923
50 0.5860 0.5798 0.5736 0.5675 0.5615 0.5555 0.5496 0.5438 0.5380 0.5323
60 0.5266 0.5210 0.5155 0.5100 0.5046 0.4992 0.4939 0.4886 0.4834 0.4783
70 0.4732 0.4682 0.4632 0.4583 0.4534 0.4486 0.4438 0.4391 0.4344 0.4298
80 0.4252 0.4207 0.4163 0.4118 0.4075 0.4031 0.3988 0.3946 0.3904 0.3862
90 0.3821 0.3781 0.3741 0.3701 0.3661 0.3623 0.3584 0.3546 0.3508 0.3471
100 0.3434 0.3398 0.3361 0.3326 0.3290 0.3255 0.3221 0.3186 0.3153 0.3119
110 0.3086 0.3053 0.3021 0.2989 0.2957 0.2925 0.2894 0.2863 0.2833 0.2803
120 0.2773 0.2744 0.2714 0.2686 0.2657 0.2629 0.2601 0.2573 0.2546 0.2519
130 0.2492 0.2465 0.2439 0.2413 0.2388 0.2362 0.2337 0.2312 0.2288 0.2263
140 0.2239 0.2216 0.2192 0.2169 0.2146 0.2123 0.2100 0.2078 0.2056 0.2034
150 0.2012 0.1991 0.1970 0.1949 0.1928 0.1908 0.1887 0.1867 0.1847 0.1828
160 0.1808 0.1789 0.1770 0.1751 0.1733 0.1714 0.1696 0.1678 0.1660 0.1643
170 0.1625 0.1608 0.1591 0.1574 0.1557 0.1540 0.1524 0.1508 0.1492 0.1476
180 0.1460 0.1445 0.1429 0.1414 0.1399 0.1384 0.1370 0.1355 0.1341 0.1326
190 0.1312 0.1298 0.1285 0.1271 0.1257 0.1244 0.1231 0.1218 0.1205 0.1192
90Sr (Strontium-90 + Yttrium-90 / Sr-90) Half-life: 28.79 years *

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9980 0.9960 0.9940 0.9920 0.9900 0.9880 0.9861 0.9841 0.9821 0.9801 0.9782
1 0.9762 0.9743 0.9723 0.9704 0.9684 0.9665 0.9645 0.9626 0.9607 0.9587 0.9568 0.9549
2 0.9530 0.9511 0.9492 0.9473 0.9454 0.9435 0.9416 0.9397 0.9378 0.9359 0.9341 0.9322
3 0.9303 0.9285 0.9266 0.9247 0.9229 0.9210 0.9192 0.9173 0.9155 0.9137 0.9118 0.9100
4 0.9082 0.9064 0.9046 0.9027 0.9009 0.8991 0.8973 0.8955 0.8937 0.8919 0.8901 0.8884
5 0.8866 0.8848 0.8830 0.8813 0.8795 0.8777 0.8760 0.8742 0.8725 0.8707 0.8690 0.8672
6 0.8655 0.8638 0.8620 0.8603 0.8586 0.8569 0.8551 0.8534 0.8517 0.8500 0.8483 0.8466
7 0.8449 0.8432 0.8415 0.8398 0.8382 0.8365 0.8348 0.8331 0.8315 0.8298 0.8281 0.8265
8 0.8248 0.8232 0.8215 0.8199 0.8182 0.8166 0.8149 0.8133 0.8117 0.8100 0.8084 0.8068
9 0.8052 0.8036 0.8020 0.8004 0.7987 0.7971 0.7955 0.7940 0.7924 0.7908 0.7892 0.7876
10 0.7860 0.7845 0.7829 0.7813 0.7797 0.7782 0.7766 0.7751 0.7735 0.7720 0.7704 0.7689
11 0.7673 0.7658 0.7643 0.7627 0.7612 0.7597 0.7581 0.7566 0.7551 0.7536 0.7521 0.7506
12 0.7491 0.7476 0.7461 0.7446 0.7431 0.7416 0.7401 0.7386 0.7372 0.7357 0.7342 0.7327
13 0.7313 0.7298 0.7283 0.7269 0.7254 0.7240 0.7225 0.7211 0.7196 0.7182 0.7167 0.7153
14 0.7139 0.7124 0.7110 0.7096 0.7082 0.7067 0.7053 0.7039 0.7025 0.7011 0.6997 0.6983
15 0.6969 0.6955 0.6941 0.6927 0.6913 0.6899 0.6885 0.6872 0.6858 0.6844 0.6830 0.6817
16 0.6803 0.6789 0.6776 0.6762 0.6749 0.6735 0.6722 0.6708 0.6695 0.6681 0.6668 0.6655
17 0.6641 0.6628 0.6615 0.6601 0.6588 0.6575 0.6562 0.6549 0.6535 0.6522 0.6509 0.6496
18 0.6483 0.6470 0.6457 0.6444 0.6431 0.6418 0.6406 0.6393 0.6380 0.6367 0.6354 0.6342
19 0.6329 0.6316 0.6304 0.6291 0.6278 0.6266 0.6253 0.6241 0.6228 0.6216 0.6203 0.6191
125mTe (Tellurium-125m / Te-125m) Half-life: 57.4 days

days 0 1 2 3 4 5 6 7 8 9
0 1.0000 0.9880 0.9761 0.9644 0.9528 0.9414 0.9301 0.9189 0.9079 0.8970
10 0.8862 0.8756 0.8651 0.8547 0.8445 0.8343 0.8243 0.8144 0.8046 0.7950
20 0.7854 0.7760 0.7667 0.7575 0.7484 0.7394 0.7305 0.7218 0.7131 0.7045
30 0.6961 0.6877 0.6795 0.6713 0.6633 0.6553 0.6474 0.6397 0.6320 0.6244
40 0.6169 0.6095 0.6022 0.5950 0.5878 0.5808 0.5738 0.5669 0.5601 0.5534
50 0.5467 0.5402 0.5337 0.5273 0.5210 0.5147 0.5085 0.5024 0.4964 0.4904
60 0.4845 0.4787 0.4730 0.4673 0.4617 0.4562 0.4507 0.4453 0.4399 0.4346
70 0.4294 0.4243 0.4192 0.4141 0.4092 0.4043 0.3994 0.3946 0.3899 0.3852
80 0.3806 0.3760 0.3715 0.3670 0.3626 0.3583 0.3540 0.3497 0.3455 0.3414
90 0.3373 0.3332 0.3292 0.3253 0.3214 0.3175 0.3137 0.3099 0.3062 0.3026
100 0.2989 0.2953 0.2918 0.2883 0.2848 0.2814 0.2780 0.2747 0.2714 0.2681
110 0.2649 0.2617 0.2586 0.2555 0.2524 0.2494 0.2464 0.2434 0.2405 0.2376
120 0.2348 0.2320 0.2292 0.2264 0.2237 0.2210 0.2184 0.2158 0.2132 0.2106
130 0.2081 0.2056 0.2031 0.2007 0.1983 0.1959 0.1935 0.1912 0.1889 0.1866
140 0.1844 0.1822 0.1800 0.1778 0.1757 0.1736 0.1715 0.1695 0.1674 0.1654
150 0.1634 0.1615 0.1595 0.1576 0.1557 0.1539 0.1520 0.1502 0.1484 0.1466
160 0.1448 0.1431 0.1414 0.1397 0.1380 0.1364 0.1347 0.1331 0.1315 0.1299
170 0.1284 0.1268 0.1253 0.1238 0.1223 0.1208 0.1194 0.1180 0.1165 0.1151
180 0.1138 0.1124 0.1110 0.1097 0.1084 0.1071 0.1058 0.1045 0.1033 0.1020
190 0.1008 0.0996 0.0984 0.0972 0.0961 0.0949 0.0938 0.0926 0.0915 0.0904
204Tl (Beta standard sources / "ORIBI"-set: Thallium-204 / Tl-204) Half-life: 3.76 years *

year\month 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
0 1.0000 0.9923 0.9848 0.9772 0.9697 0.9623 0.9550 0.9477 0.9404 0.9332 0.9261 0.9190
0.5 0.9119 0.9050 0.8980 0.8912 0.8844 0.8776 0.8709 0.8642 0.8576 0.8510 0.8445 0.8381
1 0.8316 0.8253 0.8190 0.8127 0.8065 0.8003 0.7942 0.7881 0.7821 0.7761 0.7702 0.7643
1.5 0.7584 0.7526 0.7469 0.7411 0.7355 0.7298 0.7243 0.7187 0.7132 0.7078 0.7023 0.6970
2 0.6916 0.6863 0.6811 0.6759 0.6707 0.6656 0.6605 0.6554 0.6504 0.6454 0.6405 0.6356
2.5 0.6307 0.6259 0.6211 0.6164 0.6116 0.6070 0.6023 0.5977 0.5931 0.5886 0.5841 0.5796
3 0.5752 0.5708 0.5664 0.5621 0.5578 0.5535 0.5493 0.5451 0.5409 0.5368 0.5327 0.5286
3.5 0.5245 0.5205 0.5166 0.5126 0.5087 0.5048 0.5009 0.4971 0.4933 0.4895 0.4858 0.4820
4 0.4784 0.4747 0.4711 0.4675 0.4639 0.4603 0.4568 0.4533 0.4498 0.4464 0.4430 0.4396
4.5 0.4362 0.4329 0.4296 0.4263 0.4230 0.4198 0.4166 0.4134 0.4102 0.4071 0.4040 0.4009
5 0.3978 0.3948 0.3918 0.3888 0.3858 0.3828 0.3799 0.3770 0.3741 0.3713 0.3684 0.3656
5.5 0.3628 0.3600 0.3573 0.3545 0.3518 0.3491 0.3465 0.3438 0.3412 0.3386 0.3360 0.3334
6 0.3308 0.3283 0.3258 0.3233 0.3208 0.3184 0.3159 0.3135 0.3111 0.3088 0.3064 0.3040
6.5 0.3017 0.2994 0.2971 0.2948 0.2926 0.2903 0.2881 0.2859 0.2837 0.2816 0.2794 0.2773
7 0.2752 0.2730 0.2710 0.2689 0.2668 0.2648 0.2628 0.2607 0.2588 0.2568 0.2548 0.2529
7.5 0.2509 0.2490 0.2471 0.2452 0.2433 0.2415 0.2396 0.2378 0.2360 0.2342 0.2324 0.2306
8 0.2288 0.2271 0.2253 0.2236 0.2219 0.2202 0.2185 0.2168 0.2152 0.2135 0.2119 0.2103
8.5 0.2087 0.2071 0.2055 0.2039 0.2024 0.2008 0.1993 0.1978 0.1962 0.1947 0.1932 0.1918
9 0.1903 0.1888 0.1874 0.1860 0.1845 0.1831 0.1817 0.1803 0.1790 0.1776 0.1762 0.1749
9.5 0.1735 0.1722 0.1709 0.1696 0.1683 0.1670 0.1657 0.1645 0.1632 0.1620 0.1607 0.1595
228Th (Point gamma standard spectrometry sources set / "OSGI-R"-set:Thorium-228 + daughters / Th-228) Half-life: 1.9116 years **

days 0 10 20 30 40 50 60 70 80 90
0 1.0000 0.9901 0.9803 0.9706 0.9610 0.9515 0.9421 0.9328 0.9236 0.9145
100 0.9054 0.8965 0.8876 0.8788 0.8702 0.8616 0.8530 0.8446 0.8363 0.8280
200 0.8198 0.8117 0.8037 0.7957 0.7879 0.7801 0.7724 0.7647 0.7572 0.7497
300 0.7423 0.7349 0.7277 0.7205 0.7134 0.7063 0.6993 0.6924 0.6856 0.6788
400 0.6721 0.6654 0.6589 0.6523 0.6459 0.6395 0.6332 0.6269 0.6207 0.6146
500 0.6085 0.6025 0.5966 0.5907 0.5848 0.5790 0.5733 0.5676 0.5620 0.5565
600 0.5510 0.5455 0.5401 0.5348 0.5295 0.5243 0.5191 0.5140 0.5089 0.5039
700 0.4989 0.4939 0.4891 0.4842 0.4794 0.4747 0.4700 0.4654 0.4608 0.4562
800 0.4517 0.4472 0.4428 0.4384 0.4341 0.4298 0.4256 0.4214 0.4172 0.4131
900 0.4090 0.4049 0.4009 0.3970 0.3930 0.3892 0.3853 0.3815 0.3777 0.3740
1000 0.3703 0.3666 0.3630 0.3594 0.3559 0.3524 0.3489 0.3454 0.3420 0.3386
1100 0.3353 0.3320 0.3287 0.3254 0.3222 0.3190 0.3159 0.3128 0.3097 0.3066
1200 0.3036 0.3006 0.2976 0.2947 0.2918 0.2889 0.2860 0.2832 0.2804 0.2776
1300 0.2749 0.2722 0.2695 0.2668 0.2642 0.2615 0.2590 0.2564 0.2539 0.2514
1400 0.2489 0.2464 0.2440 0.2416 0.2392 0.2368 0.2345 0.2322 0.2299 0.2276
1500 0.2253 0.2231 0.2209 0.2187 0.2166 0.2144 0.2123 0.2102 0.2081 0.2061
1600 0.2040 0.2020 0.2000 0.1980 0.1961 0.1941 0.1922 0.1903 0.1884 0.1866
1700 0.1847 0.1829 0.1811 0.1793 0.1775 0.1758 0.1740 0.1723 0.1706 0.1689
1800 0.1673 0.1656 0.1640 0.1624 0.1607 0.1592 0.1576 0.1560 0.1545 0.1530
1900 0.1514 0.1500 0.1485 0.1470 0.1455 0.1441 0.1427 0.1413 0.1399 0.1385
119mSn (Tin-119m / Sn-119m) Half-life: 293.1 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9882 0.9766 0.9651 0.9538 0.9426 0.9315 0.9206 0.9097 0.8990
50 0.8885 0.8780 0.8677 0.8575 0.8474 0.8375 0.8276 0.8179 0.8083 0.7988
100 0.7894 0.7801 0.7709 0.7619 0.7529 0.7441 0.7353 0.7267 0.7181 0.7097
150 0.7014 0.6931 0.6850 0.6769 0.6690 0.6611 0.6533 0.6456 0.6381 0.6306
200 0.6231 0.6158 0.6086 0.6014 0.5944 0.5874 0.5805 0.5736 0.5669 0.5602
250 0.5536 0.5471 0.5407 0.5344 0.5281 0.5219 0.5157 0.5097 0.5037 0.4978
300 0.4919 0.4861 0.4804 0.4748 0.4692 0.4637 0.4582 0.4528 0.4475 0.4422
350 0.4370 0.4319 0.4268 0.4218 0.4169 0.4120 0.4071 0.4023 0.3976 0.3929
400 0.3883 0.3837 0.3792 0.3748 0.3704 0.3660 0.3617 0.3575 0.3533 0.3491
450 0.3450 0.3409 0.3369 0.3330 0.3291 0.3252 0.3214 0.3176 0.3139 0.3102
500 0.3065 0.3029 0.2994 0.2958 0.2924 0.2889 0.2855 0.2822 0.2789 0.2756
550 0.2723 0.2691 0.2660 0.2629 0.2598 0.2567 0.2537 0.2507 0.2478 0.2448
600 0.2420 0.2391 0.2363 0.2335 0.2308 0.2281 0.2254 0.2227 0.2201 0.2175
650 0.2150 0.2125 0.2100 0.2075 0.2051 0.2026 0.2003 0.1979 0.1956 0.1933
700 0.1910 0.1888 0.1865 0.1844 0.1822 0.1800 0.1779 0.1758 0.1738 0.1717
750 0.1697 0.1677 0.1657 0.1638 0.1619 0.1600 0.1581 0.1562 0.1544 0.1526
800 0.1508 0.1490 0.1473 0.1455 0.1438 0.1421 0.1405 0.1388 0.1372 0.1356
850 0.1340 0.1324 0.1308 0.1293 0.1278 0.1263 0.1248 0.1233 0.1219 0.1204
900 0.1190 0.1176 0.1162 0.1149 0.1135 0.1122 0.1109 0.1096 0.1083 0.1070
950 0.1058 0.1045 0.1033 0.1021 0.1009 0.0997 0.0985 0.0974 0.0962 0.0951
44Ti (Point gamma standard spectrometry sources set / "OSGI-R"-set: Titanium-44 / Ti-44) Half-life: 60.0 years *

Month\Years 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9990 0.9981 0.9971 0.9962 0.9952 0.9942 0.9933 0.9923 0.9914 0.9904 0.9895
1 0.9885 0.9876 0.9866 0.9857 0.9847 0.9838 0.9828 0.9819 0.9809 0.9800 0.9790 0.9781
2 0.9772 0.9762 0.9753 0.9743 0.9734 0.9725 0.9715 0.9706 0.9697 0.9687 0.9678 0.9669
3 0.9659 0.9650 0.9641 0.9632 0.9622 0.9613 0.9604 0.9594 0.9585 0.9576 0.9567 0.9558
4 0.9548 0.9539 0.9530 0.9521 0.9512 0.9503 0.9493 0.9484 0.9475 0.9466 0.9457 0.9448
5 0.9439 0.9430 0.9421 0.9412 0.9402 0.9393 0.9384 0.9375 0.9366 0.9357 0.9348 0.9339
6 0.9330 0.9321 0.9312 0.9303 0.9294 0.9286 0.9277 0.9268 0.9259 0.9250 0.9241 0.9232
7 0.9223 0.9214 0.9205 0.9197 0.9188 0.9179 0.9170 0.9161 0.9152 0.9144 0.9135 0.9126
8 0.9117 0.9108 0.9100 0.9091 0.9082 0.9073 0.9065 0.9056 0.9047 0.9039 0.9030 0.9021
9 0.9013 0.9004 0.8995 0.8987 0.8978 0.8969 0.8961 0.8952 0.8943 0.8935 0.8926 0.8918
10 0.8909 0.8900 0.8892 0.8883 0.8875 0.8866 0.8858 0.8849 0.8841 0.8832 0.8824 0.8815
11 0.8807 0.8798 0.8790 0.8781 0.8773 0.8764 0.8756 0.8748 0.8739 0.8731 0.8722 0.8714
12 0.8706 0.8697 0.8689 0.8680 0.8672 0.8664 0.8655 0.8647 0.8639 0.8630 0.8622 0.8614
13 0.8606 0.8597 0.8589 0.8581 0.8572 0.8564 0.8556 0.8548 0.8539 0.8531 0.8523 0.8515
14 0.8507 0.8498 0.8490 0.8482 0.8474 0.8466 0.8458 0.8450 0.8441 0.8433 0.8425 0.8417
15 0.8409 0.8401 0.8393 0.8385 0.8377 0.8369 0.8361 0.8352 0.8344 0.8336 0.8328 0.8320
16 0.8312 0.8304 0.8296 0.8288 0.8280 0.8272 0.8264 0.8257 0.8249 0.8241 0.8233 0.8225
17 0.8217 0.8209 0.8201 0.8193 0.8185 0.8177 0.8170 0.8162 0.8154 0.8146 0.8138 0.8130
18 0.8123 0.8115 0.8107 0.8099 0.8091 0.8084 0.8076 0.8068 0.8060 0.8052 0.8045 0.8037
19 0.8029 0.8021 0.8014 0.8006 0.7998 0.7991 0.7983 0.7975 0.7968 0.7960 0.7952 0.7945
3H (Tritium / H-3) Half-life: 12.32 years

year\month 0 1 2 3 4 5 6 7 8 9 10 11
0 1.0000 0.9953 0.9907 0.9860 0.9814 0.9768 0.9723 0.9677 0.9632 0.9587 0.9542 0.9497
1 0.9453 0.9409 0.9365 0.9321 0.9277 0.9234 0.9191 0.9148 0.9105 0.9062 0.9020 0.8978
2 0.8936 0.8894 0.8852 0.8811 0.8770 0.8729 0.8688 0.8647 0.8607 0.8567 0.8526 0.8487
3 0.8447 0.8407 0.8368 0.8329 0.8290 0.8251 0.8213 0.8174 0.8136 0.8098 0.8060 0.8022
4 0.7985 0.7947 0.7910 0.7873 0.7836 0.7800 0.7763 0.7727 0.7691 0.7655 0.7619 0.7583
5 0.7548 0.7513 0.7477 0.7443 0.7408 0.7373 0.7339 0.7304 0.7270 0.7236 0.7202 0.7169
6 0.7135 0.7102 0.7068 0.7035 0.7002 0.6970 0.6937 0.6905 0.6872 0.6840 0.6808 0.6776
7 0.6745 0.6713 0.6682 0.6650 0.6619 0.6588 0.6558 0.6527 0.6496 0.6466 0.6436 0.6406
8 0.6376 0.6346 0.6316 0.6287 0.6257 0.6228 0.6199 0.6170 0.6141 0.6112 0.6084 0.6055
9 0.6027 0.5999 0.5971 0.5943 0.5915 0.5887 0.5860 0.5832 0.5805 0.5778 0.5751 0.5724
10 0.5697 0.5670 0.5644 0.5618 0.5591 0.5565 0.5539 0.5513 0.5487 0.5462 0.5436 0.5411
11 0.5385 0.5360 0.5335 0.5310 0.5285 0.5261 0.5236 0.5212 0.5187 0.5163 0.5139 0.5115
12 0.5091 0.5067 0.5043 0.5020 0.4996 0.4973 0.4950 0.4926 0.4903 0.4880 0.4858 0.4835
13 0.4812 0.4790 0.4767 0.4745 0.4723 0.4701 0.4679 0.4657 0.4635 0.4613 0.4592 0.4570
14 0.4549 0.4528 0.4507 0.4485 0.4465 0.4444 0.4423 0.4402 0.4382 0.4361 0.4341 0.4320
15 0.4300 0.4280 0.4260 0.4240 0.4220 0.4201 0.4181 0.4161 0.4142 0.4122 0.4103 0.4084
16 0.4065 0.4046 0.4027 0.4008 0.3989 0.3971 0.3952 0.3934 0.3915 0.3897 0.3879 0.3861
17 0.3843 0.3825 0.3807 0.3789 0.3771 0.3753 0.3736 0.3718 0.3701 0.3684 0.3667 0.3649
18 0.3632 0.3615 0.3598 0.3582 0.3565 0.3548 0.3532 0.3515 0.3499 0.3482 0.3466 0.3450
19 0.3434 0.3418 0.3402 0.3386 0.3370 0.3354 0.3338 0.3323 0.3307 0.3292 0.3276 0.3261
88Y (Yttrium-88 / Y-88) Half-life: 106.626 days

days 0 2 4 6 8 10 12 14 16 18
0 1.0000 0.9871 0.9743 0.9617 0.9493 0.9371 0.9250 0.9130 0.9012 0.8896
20 0.8781 0.8667 0.8555 0.8445 0.8336 0.8228 0.8122 0.8017 0.7913 0.7811
40 0.7710 0.7611 0.7512 0.7415 0.7320 0.7225 0.7132 0.7040 0.6949 0.6859
60 0.6770 0.6683 0.6596 0.6511 0.6427 0.6344 0.6262 0.6181 0.6101 0.6023
80 0.5945 0.5868 0.5792 0.5717 0.5644 0.5571 0.5499 0.5428 0.5358 0.5288
100 0.5220 0.5153 0.5086 0.5020 0.4956 0.4892 0.4828 0.4766 0.4704 0.4644
120 0.4584 0.4524 0.4466 0.4408 0.4351 0.4295 0.4240 0.4185 0.4131 0.4077
140 0.4025 0.3973 0.3922 0.3871 0.3821 0.3771 0.3723 0.3675 0.3627 0.3580
160 0.3534 0.3488 0.3443 0.3399 0.3355 0.3312 0.3269 0.3227 0.3185 0.3144
180 0.3103 0.3063 0.3024 0.2985 0.2946 0.2908 0.2870 0.2833 0.2797 0.2761
200 0.2725 0.2690 0.2655 0.2621 0.2587 0.2553 0.2520 0.2488 0.2456 0.2424
220 0.2393 0.2362 0.2331 0.2301 0.2271 0.2242 0.2213 0.2185 0.2156 0.2128
240 0.2101 0.2074 0.2047 0.2021 0.1995 0.1969 0.1943 0.1918 0.1893 0.1869
260 0.1845 0.1821 0.1797 0.1774 0.1751 0.1729 0.1706 0.1684 0.1663 0.1641
280 0.1620 0.1599 0.1578 0.1558 0.1538 0.1518 0.1498 0.1479 0.1460 0.1441
300 0.1422 0.1404 0.1386 0.1368 0.1350 0.1333 0.1316 0.1299 0.1282 0.1265
320 0.1249 0.1233 0.1217 0.1201 0.1186 0.1170 0.1155 0.1140 0.1126 0.1111
340 0.1097 0.1083 0.1069 0.1055 0.1041 0.1028 0.1014 0.1001 0.0988 0.0976
360 0.0963 0.0951 0.0938 0.0926 0.0914 0.0902 0.0891 0.0879 0.0868 0.0857
380 0.0846 0.0835 0.0824 0.0813 0.0803 0.0792 0.0782 0.0772 0.0762 0.0752
65Zn (Zinc-65 / Zn-65) Half-life: 244.06 days

days 0 5 10 15 20 25 30 35 40 45
0 1.0000 0.9859 0.9720 0.9583 0.9448 0.9315 0.9183 0.9054 0.8926 0.8800
50 0.8676 0.8554 0.8433 0.8314 0.8197 0.8082 0.7968 0.7855 0.7744 0.7635
100 0.7528 0.7421 0.7317 0.7214 0.7112 0.7012 0.6913 0.6815 0.6719 0.6624
150 0.6531 0.6439 0.6348 0.6259 0.6170 0.6083 0.5998 0.5913 0.5830 0.5748
200 0.5666 0.5587 0.5508 0.5430 0.5354 0.5278 0.5204 0.5130 0.5058 0.4987
250 0.4916 0.4847 0.4779 0.4711 0.4645 0.4579 0.4515 0.4451 0.4388 0.4327
300 0.4266 0.4205 0.4146 0.4088 0.4030 0.3973 0.3917 0.3862 0.3807 0.3754
350 0.3701 0.3649 0.3597 0.3546 0.3496 0.3447 0.3399 0.3351 0.3303 0.3257
400 0.3211 0.3166 0.3121 0.3077 0.3034 0.2991 0.2949 0.2907 0.2866 0.2826
450 0.2786 0.2747 0.2708 0.2670 0.2632 0.2595 0.2558 0.2522 0.2487 0.2452
500 0.2417 0.2383 0.2349 0.2316 0.2284 0.2251 0.2220 0.2188 0.2157 0.2127
550 0.2097 0.2068 0.2038 0.2010 0.1981 0.1953 0.1926 0.1899 0.1872 0.1845
600 0.1819 0.1794 0.1769 0.1744 0.1719 0.1695 0.1671 0.1647 0.1624 0.1601
650 0.1579 0.1556 0.1534 0.1513 0.1491 0.1470 0.1450 0.1429 0.1409 0.1389
700 0.1370 0.1350 0.1331 0.1312 0.1294 0.1276 0.1258 0.1240 0.1223 0.1205
750 0.1188 0.1172 0.1155 0.1139 0.1123 0.1107 0.1091 0.1076 0.1061 0.1046
800 0.1031 0.1016 0.1002 0.0988 0.0974 0.0960 0.0947 0.0933 0.0920 0.0907
850 0.0895 0.0882 0.0869 0.0857 0.0845 0.0833 0.0821 0.0810 0.0798 0.0787
900 0.0776 0.0765 0.0754 0.0744 0.0733 0.0723 0.0713 0.0703 0.0693 0.0683
950 0.0673 0.0664 0.0654 0.0645 0.0636 0.0627 0.0618 0.0610 0.0601 0.0593
* One month is equal to 1/12 part of a year.
** One year is equal to 365 days.
Reference data: T.V.Golashvili, V.P.Chechev, A.A.Lbov, V.M.Kupriyanov, A.P.Demidov "Nuclide Guide-2". Edited by V.N.Mikhajlov, 2-nd edition, revised, Moscow, ATOMINFORM, 2002.

   News
10.12.2009

12.23.2008
GAm1.14, GBa3.14 and GCo7.14 sources are given a new strength class C66544 (in accordance with ISO classification).

11.10.2008
An insert is developed to fix Mössbauer sources in the container.

05.07.2008
These sources are used as working standard for calibration of detectors in spectrometers of high-pure germanium.

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