Capintec CRC-25R - MULTIPLICATION FACTORS FOR XE135 M ACTIVITY MEASUREMENTS; MULTIPLICATION FACTORS FOR W188 ACTIVITY MEASUREMENTS

CAPINTEC, INC CRC
®
-25R
Multiplication factors for Xe135m Activity Measurements:
Use a Calibration Number of 181 and a multiplication factor as indicated in the following table
to obtain Xe135m activity at time “t” minutes after an initially pure source of Xe135m is
obtained.
Xe135m
t
[minutes]
Multiplication
Factor
t
[minutes]
Multiplication
Factor
0 1.000 60 0.807
10 0.990 75 0.676
20 0.975 90 0.514
30 0.952 120 0.217
45 0.897 180 0.019
Multiplication factors for W188 Activity Measurements:
Use a Calibration Number of 111 and a multiplication factor as indicated in the following table
to obtain W188 activity at time “t” hours (or days) after an initially pure source of W188 is
obtained.
W188
t
[hours]
Multiplication
Factor
t
[days]
Multiplication
Factor
0 100.0 1 5.09
1 45.6 2 3.75
2 29.9 3 3.40
4 18.2 4 3.30
6 13.4 5 3.26
12 8.0 6 3.25
18 6.0 7 3.24
July 07 APPENDIX III A3 - 7