Assuae:
a.
b.
iosint source
0.5 Kev
beta anergy
e. ue 10 er*/an
.
é. ‘Rate of decay follous t@)+<
The dose delivered af the surface of an iraginary sphere af distance
RK from « point source.*
(1)
E(R) = Oy ome
**
Pd
grax
where: K(R) @ dose delivered at the surface of an
imaginary sphere at distance F
ES average energy of beta particles
C m total nuxber of disintagrations
Substituting y: © 15ex?/ee
Then:
bBo
e
cB»
>
(2) K(k) 32,307 sghch
he
ax
6.25
te
or
6.35
girdis integration
=~
(3.a.) K(R) = mp x 19™
(3.b.)
'
/) © wase absorption coefficient
E(K) = Qe x yo76
wo
2
R«
Disintegration
“1
2 LOR.
ke
Bilbiress
;
BlLlinegs
te
DOE/NY
aisintegration
Equation (3.e.) is plotted on the attached graph.
Fol. PISSIGN PRODUCTS,
\
(5)
le ns
~1.2
a At
where:
4, = Jisintegrations per unit tine at time "a" after detonation
Ay ®@ diaintegrations per unit tice at one unit of tice after
Siossi, Halle and Elite, Aall, "Distributed Beta cources in Uniformly absorbing
Media" Nueleoniss July 1950, ¥. 7, Bo. 1
az Dish
queiin
:
ot