15
3x10
3
TT
TT
tT
7
4
10°
137
Cs
SPIKE
4
» 10°
3S
§
3s
3
Qo
»
:
12
Sb’ SPIKE
S 10+
S
o
>
re
a
SOIL
9-10"
10"
Fig. 6.
L
0.5
l
10
MEV
15
Gamma-ray spectrum of a 9 to 10-inch-depth
increment from old soil compared with the
gamma spectra of sb!25 and cs}37.