20
10
T
Tr
10°
4
2
>
s
S
$
SbSPIKE
o lO F
7
S
3
S
=
4
Tor
SOIL
9-10"
=]
10
J
0.5
|
1.0
1
1.5
MEV
Fig. 10.
Gamma-ray spectrum of young soil from a
depth increment of 9 to 10 inches compared
with the gamma spectrum of Sb
5,
4