IN A (" NaI CRYSTAL
(l-a*}
ail.
ex
r
.
THEORY NEGLECTING
r
L
Lo
SECONDARY EFFECTS
YY
Agg* Area of Photo Peck
-
4
J
\ 7
S
a
Ary *Areqg of Total (Photo and Compton)
“
ma
-—_
i
0.03155
Fig. 3.26
i
i
i
600
jt
tf
ik
poo
ENERGY (KEV)
i
2700
Theoretical and Experimental Ratios of the Area of the Photo-
peak to Total Area and Fractional Absorption in a lein, NaI Crystal
tT
rb
bity
\
TT
i
l
Prreyty
f ti pid
1
1
|
fi ii
q
fo
tT
PHOTO PEAK CORRECTION FACTOR
(GAMMA RAYS/VOLT COUNTAMIN)
3
pf
er ri4ry
T
TATE
t
T
100
i
l
i
i
|
co
ENERGY (KEV)
Lod dt
$00
1600
Fig. 3.27 Factor to Convert Area of Photopeak in Gamma Rays/Volt
Count/min into Number of Gamma Rays/min
81