[ RadSafe ] RE: Naturally occurring Pu-244

[Franta, Jaroslav]

UNRESTRICTED | ILLIMITÉ

better late than never ? (pls. see reference pasted below original request....)

PS. if anyone has a copy of the paper, I would appreciate one too (Thnx)

Jaro
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-----Original Message-----
From: Philip Egidi [mailto:phil.egidi at state.co.us]
Sent: Wednesday September 04, 2002 7:00 PM
To: radsafe at list.vanderbilt.edu
Subject: Naturally occurring Pu-244

RADSTERS,
I have a time critical response to put out to a member of the public
about naturally occurring Pu-244.
I have looked at NCRP 94, Kocher, UNSCEAR, Eisenbud/Gessell, Schlien,
and the prestigious Google.  I don't have a whole lot to show for it yet.
Does anyone have (preferable electronic) any papers or references on
the occurrence and properties of naturally occurring Pu-244?

Thanks,
Phil Egidi
phil.egidi at state.co.us 
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http://www.nature.com/nature/journal/v234/n5325/pdf/234132a0.pdf
Nature 234, 132-134 (19 November 1971) | doi:10.1038/234132a0; Received 13 September 1971

Detection of Plutonium-244 in Nature
D. C. HOFFMAN*, F. O. LAWRENCE*, J. L. MEWHERTER? & F. M. ROURKE?

*Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico
?General Electric Company, Knolls Atomic Power Laboratory, Schenectady, New York

Abstract

Mass spectrometric measurements of plutonium isolated from Precambrian bastnasite confirm the presence of 244Pu in nature. Although the existence of 244Pu as an extinct radioactivity has been postulated to explain the xenon isotope ratios observed in meteorites, this is the first indication of its present existence in nature.


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