15
3.
x10°
T
T
T
~
10°
137
Net Counts Per Minute
Cs
10
SPIKE
2
|
ok
rer
10"
Sb’ SPIKE
:
SOIL
7
9-10"
:
0.5
oo
1.0
1
1.5
MEV
Fig. 6.
Gamma-ray spectrum of a 9 to 10-inch-depth
increment from old soil compared with the
gamma spectra of Sb
and csi37,