20
10
3
T
T
T
J
10°
¥S
'
.
§
x
s
Sb’ SPIKE
Vio b
»
a
SS
g
4
Jk
SOIL
9-10"
10!
L
0.5
|
10
i
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,
2