or
§
A, = ——tt____. e/sq em;
KE, BR
een
however,
photons/sec/sq en = (ic/s4 om )(3.7 x 104)
t
and
BE,
t
t
= Ei
rt
where
A,
=
(K)(Eq/ry)(B)(R) (ry)
37 xt
oh
K Ey, BR
oe
1!
dy.
fae
oe
"ao 20h
SSPE x 10%).
photons/sec/sq cm,
1
Let
I, = 1 r/hr at 0 +9 days
K
= 0.12
(ref 7)
B
= 1.45
(ref 6)
R
= 0.60
(ref 10)
E
= 0.344 Mev/photon at O+ §& days.
The value of the average ganra energy was experimentally determined
from a Shot 5 sample at 0+ & days.4/ The zanma spectrum experienced
little chanpe over the period 0+ &to 0 + 10 days and its applicability
to Shot 1 calculations has heen indcicated.*
A
t
At
*
:
it
Tharefore,
7 x 10“)(1
oaetter
1.03 x 10° photons/sec/sq cm at 0 + 9 days
Private communication from C.S.Cook, USNRDL
145
.
Therefore,
.
= averare gemma energy in Mev/photon.
‘
oe
8
E,