30
THE SHORTER-TERM BIOLOGICAL HAZARDS OF A FALLOUT FIELD
DECAY RATE photons/fission- sec}
PHOTON INTENSITY (photons /Mev-fission-sec) _
SHORT LIVED FISSION PRODUCT GAMMA RADIATION
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REE
Pb
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* PHASE ! OF EXPERIMENT
1
© PHASE
2
5
10
2
5
1
.
.
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4
31
#
108
2
rT, TIME AFTER FISSION (sec)
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108
2
5
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Fraure 6.—~Decay rate of fission product gamma rays for 0.28 to 6.0 Mev energy range with
superimposed points from
energy spectra study,
r
!
'
0
t
2
3
4
PHOTON ENERGY (Mev)
5
6
Ficurs 4.-—Fission product photon energy apectrum with superimposed spectrum from time decay study.
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