17
3
10
t
T
T
gp!25
°
|
st 25
1}OT
cs! 37
Zn69
|
960
C080
LY
2 10-
7
=
LITTER
®
oO.
L
GQ
3
°
Oo
_
te
—_—
w
za
GUANO
| }
L
0.5
1.0
|
1.5
MEV
Fig. 8.
Gamma-ray spectra of litter and guano collected
in an area of old soil.