x.
Robert A.
Results
Conard
for
-2-
Ms.
1977
follow:
45.2+0.4 nCi
il
‘137¢cs whole body
7"lam thorax
<.15 nCi our MSMA
*39pu thorax
24lam head (skull)
239pu head
August 30,
< 25 nci
"
"
<.02 nci
*
‘
(skull)
"
oo"
nCi
<5.0
.
For all measurements, a control subject of the same sex
and similar size was employed to verify the background of
the counting systems.
Figures 1 and 2 (attached) give the gamma-ray, pulseheight spectra for Ms.
using the 8"x4" NaI(T1l)
and the NaI(T1)-CsI(Tl) detectors respectively.
These
spectra illustrate what was determined quantitatively, 1.e.,
that there is ‘?’Ccs present ('?’Ba X ray in the low energy
measurement)
americium.
but no detectable
In addition to external
isotopes
of plutonium or
counting procedures we measured
the urine samples for the presence of
‘?’Cs and *??Pu.
the 7?%pu content was below our detection limit or
the 95% confidence limit for a 5000 minute count.
was excreted at the rate of 0.4 pCi/ml or based on
excretion rate of 1 liter/day, 400 pCi/day.
If we
value,
and a measured body burden of
45.2
nCi,
Again
15 fCi at
Cesium-1]37
a urinary
use this
we can
estimate a biological half time of ~ 78 days compared to the
ICRP(10) effective half-life of 70 days.
.
,
Por our own
;
finding
burden
know.
out
if
intercomparison,
our
measurement
agreed with
I hope
when we
can
this
that of
report has
measure
some
of
.
Stan's.
we would
Ms.
Mr.
bee: Dr.
Merril Fisenbud
McDonald
E.
Henry Spitz
he can
been of some help.
\
Dr.
interested
137
Cs
in
hody
let us
Let us
know
natives.
Vexsy
NcC/fl
ec:
Dr.
Perhaps
be
truly yours,
PNY
Norman Cohen, Ph.D.
Assistant Professor
Environmental Medicine
Wrenn
Walter Weyzen
a
PRIVACY ACT MATERIAL REMOVED
5011188