‘The following data are abstracted froz experixe:tal results, wherein
.
a thin P* source prepared by soeking a filter paper in a solution of
phosphetes, allowing it te dry, and then measuring surface dose rates
with a surfece lonisetion charber.®
Thickness of source
Activity of source
-.
_—
.
-
9.6 ng/ex*
|
|
Surface dose rate
0.127 rep/sec _
457.
Dosage rate at depth of x centinsters
ee
77,0pe/oxt
reps/hr
p7 705K
&. Theoretically
_
equetion
R = Hach (for P32)
Substituting above deta
wm.
e 5)( 0. 007) &9
ne 25 Foe
= 7.0 C repa/hr
Let C & 77pc/ext
Then R@
77
wee oa)reve/ar ah 7 ng/en? (P32)
*Ef ecE
t: xternal Zirkle, Rayuond E. FeGrawiill Book
os
Tp
Conupany.
1951.
aay
-FF= “63