TABLE 1
SOURCE SPECTRA USED FOR 7°°u and 7°? Th EXPOSURE
RATE CALCULATIONS
Source
Energy
(Mev)
~ 24
.29
~35
-49
- 61
~77
. 94
1.12
1.24
1.39
1.58
1.76
2.20
2.44
23% uy Series
Source
Photons per
Energy
Disintegration
(MeV)
-1l
. 24
.38
. 08
242
-1ll
. 04
_19
. 08
. 09
. 06
.21
. 08
. 02
-16
- 24
. 33
.44
.51
.58
73
. 92
1.60
1.80
2.62
22
222th Series
Photons per
Disintegration
-12
. 80
_19
.05
.09
.30
.10
-56
- 28
~ OL
-35