90 ro
Y
|
RELATIVE COUNTER PHOTON EFFICIENCY (PER CENT)
80
€@
T
r
[
«
T
—_ =
\
|
|
|
T
T
_
\
‘0
t
NS
30
—-—
20
—-
po
ape
——]
nn
whe ee ff
—=
.
|
L
OP Pope ap fee ap! mei nee
nen pafy
3
i00
200
300
|
i
aoc
500
600
700
800
900
INCIDENT PHOTON ENERGY (KEV)
Fig. 2.1
Relative Photon Efficiency for Scintillation
Counters, Using 1-1/2 by 1-1/2 in. Nal Crystal
and 1600 ng/sq cm Aluminum Absorber
1000
HOC
1200