TABLE B.25 OBSERVED BETA-DECAY RATES Beta counting samples, supported and covered by 0.80 mg/cm? of pliofilm, were prepared on the YAG 40 from aliquots of SIC tray stock solution. Measurements initiated there were usually continued on Site Elmer, and terminated at NRDL. When stock solution activity permitted, a portion was shipped to NRDL as soon as possible, allowing simultaneous field and NRDL decay measurements to be obtained. Nomiunally identical continuous-flow proportional detectors were installed at all three locations, and small response differences were normalized by Cs'"7 reference standards. No scattering or absorption corrections have been made to the observed counts. Counter Counter Location Age Activity Location Age counts/sec hr Shot Flathead, YAG 40 10‘ fissions Sample 16.4 19.5 21.7 24.0 27.9 31.1 34.1 36.6 41.1 45.0 hr 3473/8, 3.09108 fission, 127.4 x 1074 109.3 99.42 ” 99.42 49.8 49.97 NRDL 54.1 44.22 x1074 57.9 40.97 62.0 38.68 65.8 36.47 69.6 34.38 73.8 34.21 15.5 32.87 78.8 30.66 85.0 29.26 90.1 27.90 96.5 26.24 103.7 24.19 Shot Navajo, Sample P-3753/6 #2, 7.2410" fission, Sheif _ Site Elmer 7.428 x 1073 5.801 4.933 4.386 3.701 3.276 2.950 2.495 2.262 1.748 67.8 14.8 027 87.0 89.9 99-0 112.3 123.8 130.9 22.83 20.07 18.66 153.4 161.5 175.0 194.2 224.1 247.8 15.33 14.69 13.02 11.49 9.412 8.339 136.6 80.06 72.70 67.97 63.35 57.69 53.26 12.62 15.58 18.24 20.33 23.76 26.90 29.78 34.51 28.0 47.9 NRDL 1.157 x 1073 194.8 215 261 333 429 501 598 123 891 1,034 1,223 1,417 1,582 3. x10 17.384 11.49 107 10.18 7.718 5.389 3.586 2.975 2.226 1.692 1.226 0.9812 0.7773 0.5916 0.5194 984 1,030 1,080 1,151 1,198 1,246 1,342 1,450 1,485 1,534 4.196 «x 1978 3.906 3.731 3.223 3.269 3.128 2.620 2.647 2.477 2.373 1,750 2.040 1.883 1,850 8.640 = 107% 10° fissions Shelf 1 Site Elmer Site Elmer YAG 40 Activity counts/sec 2,014 1.710 8.262 ean ioe 7.363 2,541 1.293 YAG 40 122.9 150.0 470.6 226.1 278.5 5.691 x 1074 4.446 3.736 2.597 1.973 2,666 2,834 3,266 3,500 3,914 1.252 1.077 9.346 x 107§ 8.678 7.413 NRDL 478 574 Lo1r «21074 7.937 x1907§ 4,320 4,750 8.308 5.617 893 742 B14 B62 912 6.436 5.904 5.359 4968 £733 6,580 ’ 6,740 8,230 8,640 3.752 . 3.453 3.039 2.440 st sane a 257 ae