TABLE II
DOSE RATE CALIBRATION OF 4" x 4" DETECTOR - NATURAL EMITTE
K
U
Isotope
40x
(No/?)*
(NP/No)
(3/T)
37500
1.08
0.192
Gamma Energy (MeV)
Dose Rate Contribution (ur/hr)
(Np/1) Counts (29 min.)
(ur/hr)
1.46
1.71%
7800
214pi
1.76
0.76/p.p.m.
23000
1.05
0.037
900
Th
20871
2.62
0.36/p.5
22800
1.03
0.049
1150
*Calibrated with 1/4" Bakelite shield.
~ 36 -
-
1
yr
Te re eee nema eee rig