caece
of the absorption medium, and produced a consequent change in the shape of
the gamna-rate-versus-time curves during this period.
1.3
THEORY
The gamma radiation omitted from a nuclaar datonation may te divided
into two portions; initial and residual reiiation. Tha residual portion
may includa radiation both from fallout and froa nautron-induced activity.
1.3.1
Initdiale-<Geor saReddation,
For devices with yinlds of lass tran
100 kt, in whichthe hyarodjnasle erfect is uall, the initial radiations
are divided approxinitely as showa in Table 1.1 (from Sufersuca 4).
TAGLB LoL
The
Freooy PastIticd sag DUITIAGL 2 Olas IOmS POM
FISSTON-TYFR BVIGS
Froa Reference &
Yschaniaa
Fercont of Total
Fissica Sasrez
Total Zoeorgy
yer Stizatoa
tat
Frost Noutrana
Pro pt Cu-sag?
40
40
Colayed heulrowe
Ou
Master ehat Guts
Yiwatog Pic
tant Tahae
Fiseton Pract teutrhinog
2.7
2.7
5.5
3
8
3%
Soh
11
0.2
*Hoatly susccrk-d in toe davice
jor contributions to inittal-gamra rodlatioa are from ths fiassLen-preduct
et cama the geraa rediabtca fron moatron esphum by i (nay) in
Saczimlogiva co ‘poncaha ond] taoe . 9 yrecuph Es VAS ara rearly
sorbed da tha e@avics dteelf ad cee of 11tile ctealfienn 29 cutaidg
tha f4r. fonemictuse ae poode.iasta ah clogs 0’ times
wfve Y
Peubon ey Por ft)
tlog ester ora.
view (. cfarenca
Pee
wwe,to