Table 3 "F" Factors For Common Isotopes; Table 4 Correction Factors - GE RSDetection RS-S131-200-ER0000 User Manual

RSDetection
User's Manual
Isotope
Co-60
Cs-137
Ra-226
Kr-85
Kr-85m
Kr-87
Kr-88
Xe-133
Xe-133m
Xe-135
Am-241
These values can be used to provide a correction factor if the source of the gamma field is
known. Since the detector is calibrated with respect to Ra226 this correction is the ratio of
the measured isotope to the Ra226 "F" factor. A table of these correction factors is shown
in Table 4.
Co-60
Cs-137
Ra-226
Kr-85
Kr-85m
Kr-87
Kr-88
Xe-133
Xe-133m
Xe-135
Am-241
To use these factors, assume you were measuring Co60 and a dose rate of 150uR/h was
measured. To correct this reading this value should be divided by 0.98, yielding 153 µR/h.
March 2016
Page 20

Table 3 "F" Factors for Common Isotopes

Energy (MeV)
1.17, 1.21
0.667
Various
0.5
0.15, 0.3
0.4, 0.85, 2.6
0.19, 2.4, 0.85, 2.2,1.55
0.081
0.233
0.25, 0.6
0.059

Table 4 Correction Factors

0.89
0.91
0.91
0.94
1.19
0.93
0.92
1.46
1.11
1.07
0.46
0.980
1.002
1.000
1.035
1.314
1.027
1.013
1.608
1.223
1.178
0.507
g
F
S131-200-UM Rev A