bh Eyevitio
Or mawee
i
oe fn
CELCULATICNS
Of Ret
Gomes
4
ieee:
Vale Tite ct Testo Sasa “LIkbliorset a ran
Conic omos JPae Lane
a=
Ta ane
-_
fee Ri et
eee
fee
ee PAY De cee Sk ae Taken
Sree
1,5 Mev Beta (Mean ensvey = 0.5 Mov}
} = 10 cmt/ pu
o-oo
2
rm
*
4
a
.
x
y
“sn
mes
=
2
=~"
_
*
Pa
.
*
(This assumes a single mass evsoryiion coefficient. )
'
N = No ex
3
where: No = number of betas at surface per cm*
" depth x
4
°%
N=
poe mass absorption coefficient
:
per sec.
¥% 2 distances (darth) under eonsidersetion
aa
— ss
:
“~
ax Say
7 Ko ey
f
-~
ae
R
pon: fo
a
1
2
Wheeas KOS Gers rate at divi
Bom rosa energy of betas
~(0} (0,097)
(30MIoTkMee(925)
=
rR
?
ym
-
2
ft
Wo 23.7 x GC 4C
kK
RK
a,
=
€,65
=
(1.29
ts DA
<
C
rey
~
~~
1
as
ee.
.
O 2 setivit, in microsuries per 2?
/, meth,
igre Y as
2,33 No Mev/ga-see,
r
wheres
ed ct
an
a
mk
Qs
a fae
4
:
25,90
CO plds/fie
}ivennis
mimic
Assume:
5
C = £0 ucfem* (peta)
wheres
C= 6.2 C
CH acitatty/on* din
= (5.4) (59)
st
or
A432
x
R= dose rats by corth 7 meSonn tn reps
ps/her
2 {OU rads/nhyr
REA 2
HER H
BER
He
HE
HR
HR
RH
GF
ERR
RRRARRH
HX
FH
e at 7 Mofone to Garma Dose
(Repe/te]
Dove
BetaRat
Conpsrison
in |
te Mea
Three Fe
at
80po/ent (vets), equivalent to
gacurie/mi*
(gemma)
432 = 105
+2.
nee
\
Assume:
e Fi
t
oo,
te
Abov
e Sur