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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
112 Nuclear Forensic Analysis
species
235
UX,
238
UX,
235
UZ, and
238
UZ. If the U occupies a chemically active site
i
n
e
ach
m
olecule,
t
hen
i
sotopic
e
xchange
c
an
o
ccur:
235
UX +
238
UZ
235
UZ +
238
UX.
An
e
quilibrium
i
s
e
stablished
i
n
w
hich
t
he
r
elationship
b
etween
t
he
c
oncentrations
o
f the four species is dened by an equilibrium constant K:
K = × ×([ ] [ ]) / ([ ] [ ]).
235 238 235 238
UZ UX UX UZ
Statistical
me
chanics
w
ould
r
equire
t
hat
K
=
1
f
or
a
ny
s
uch
r
eaction,
b
ut
q
uantum
mechanics allows different isotopic afnities among the compounds, based on
e
nergy
l
evels
o
f
v
ibrational
s
tates,
t
ending
t
o
m
ake
l
ighter
i
sotopes
c
oncentrate
i
n
l
ess
t
ightly
b
ound
m
olecules
[
17].
T
he
F
rench
C
hemex
p
rocess,
w
hich
e
xploited
a
v
ery
s
light
d
ifference
i
n
t
he
I
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Publisher Resources

ISBN: 9781439880616