Capintec CRC-25R - MULTIPLICATION FACTORS FOR SB125 ACTIVITY MEASUREMENTS; MULTIPLICATION FACTORS FOR TE129 M ACTIVITY MEASUREMENTS

CAPINTEC, INC CRC
®
-25R
Multiplication factors for Sb125 Activity Measurements:
Use a Calibration Number of 289 and a multiplication factor as indicated in the following table
to obtain Sb125 activity at time “t” days after an initially pure source of Sb125 is obtained.
Sb125
t
[days]
Multiplication
Factor
t
[days]
Multiplication
Factor
0 1.000 90 0.878
10 0.977 120 0.861
20 0.958 150 0.849
30 0.941 180 0.841
40 0.927 360 0.824
50 0.914 540 0.822
60 0.903
∞
0.821
Multiplication factors for Te129m Activity Measurements:
Use a Calibration Number of 817 and a multiplication factor as indicated in the following table
to obtain Te129m activity at time “t” hours after an initially pure source of Te129m is
obtained.
Te129m
t
[hours]
Multiplication
Factor
t
[hours]
Multiplication
Factor
0 10.0 6 6.55
1 8.04 8 6.50
2 7.25 10 6.49
4 6.701 12 6.48
Equilibrium
July 07 APPENDIX III A3 - 5