The dose would be
iv
=
2.65 ny, E, fa
=
Mev/ft .3/sec
00281 { m EQ |
| 60 |2.6 x 10-6
|
|28, 320]
1.29 x 1073 | 100
7.38 x 10° n, E, rads/mimate
R37
.
iy
-
Se
ti
ee,
.
re,
Since the usual activity neasurene nt is d/n, N, will be defined as 60 ny;
and the
Dose Rate
= 1.23 x 10-7 N,E. millirads/mimute
where N, is photons per minute at tim t.
Energy Function
The contribution of the various isotopes as a function of time is
given in Appendix B.
These values are calculated from the date of Hunter and
Ballou for slow neutron fission.
The weighted average gamma energy for
various times is given in the following table:
Days After
Burst
Average
Ev
1
0.70
3
0.54
9
0.9
i
0.5)
6
8
O.h9
0.50
30
0.52
5
O.L7
10
0.52
60
120
0.52
0.57
730
C28
365
© 85
3650
C.59
2
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