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Nuclear Forensic Analysis, Second Edition, 2nd Edition
book

Nuclear Forensic Analysis, Second Edition, 2nd Edition

by Kenton J. Moody, Patrick M. Grant, Ian D. Hutcheon
December 2014
Intermediate to advanced content levelIntermediate to advanced
524 pages
20h 21m
English
CRC Press
Content preview from Nuclear Forensic Analysis, Second Edition, 2nd Edition
55Physical Basis of Nuclear Forensic Science
As Figure 2.11 shows, the Q-value for β
decay from
234m
Pa is quite large (2277 keV).
A
s
a
c
onsequence,
β
d
ecay
c
ompetes
s
uccessfully
w
ith
d
ecay
p
rocesses
i
nternal
t
o
234
Pa (referred to collectively as isomeric transition, or IT).
234m
Pa decays with a
h
alf-life
o
f
1
.17min,
9
9.87%
o
f
t
he
t
ime
t
hrough
β
decay to low-J states in
234
U, and
0
.13%
o
f
t
he
t
ime
b
y
I
T
t
o
t
he
J
π
= 4
+
234
Pa ground state (sometimes written as
234g
Pa).
234g
Pa, in turn, decays with a half-life of 6.75h to completely different states in
234
U.
T
he
γ
t
ransition
f
rom
234m
Pa to
234g
Pa is so highly converted that no 80-keV photons
a
re observed, and the decay occurs by 100% IC.
Anticipating
o
ur
i
mpending
t
reatment
o
f
n
uclear
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Publisher Resources

ISBN: 9781439880616