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