==
TABLE 1.2 CALCULATED BUILDUP FACTOR:
Tue buildup factor (5) given here is the factor B_ (0, E,) as
computed by Muclear Development Associates for APSF (Reference 6).
Energy (E.)
5
1000 yds
1500 yds
3000 yds
16,2
2903
85.0
ev
1
3
é
10
385
2097
1.70
§ 435
4.00
2,01
10,2
7,00
2.90
ee ee ee
tetFydrcdyuadcEficcle
AS Bhow in Sectic . 163.3, tie
yitenuation of gam rediation is highly dependent on the amount of
absorber between the source and the detector.
For weapons of less
than 100-kt yield, essentially all of the initial gama: radiation is
eaitted before the shock front can produce an anprecisble chanze in
wo tite suin. auoom tle ef te abr boli. Bloke Gan Geese
Feu
hicieyielc devicer, the velocity cf the su.cch frou is sufiiciunly
hig. te produce a strong enhancenent cf a large percentage of the
initial garma redietion (Refcrence 7). The higher the yield, the
larger is this percentage.
A simplified treatment of the hydrodynamic
effect follows.
Assume e 6phere that has e volume Vy and radius R, and is filled
with a gas cf density p and mass M.
= Vip = Any3 p/3
oc
Then,
ST. Logs ere
Let the ges be compressoc ints & shell with thicmes: a
dé
Lops
(ie?
J?