4)
The assumption that has to be made for the teeth experiment is needed in
the extrapolation from animal data, e.y., distribution of Pu in teeth
samples of animals - distribution of Pu in teeth samples of humans.
5)
Calculalions lo show plausibility of autoradiography on the MI samples:
Tooth
specific gravity:
(ICRP 23 Reference Man):
weight:
Ll pm
average activity concentration:
200 £Ci/gm
2.09 g/cm
3
200 £Ci/ym x 2.09 g/em> x 1 gm = 418 £Ci/em?
leu
Ll
slice be 10 pm
tl
418 ECi/em? x LO ym x 1074 em/ym = 0.418 £Cifem*
0.000928 dpm/em*
Since A = AN
A/xX
=
N
900928dpm/cm
0.693
2
24,360x5.25x10° min
=N
1.71 x 10! atoms = N in 1 em
Note:
1 in a million Pu. emits lu/wk
One week:
17.1 a tracks/cm2 detectable)
Possible interference from other a emitters:
Uranium to Plutonium ratio
1 to 100; Thorium to Plutonlum 1 to 30, however, the Th a's are much lower
in energy.
JO095b4