[ RadSafe ] RE: Naturally occurring Pu-244

[Maury Siskel]

You've probably seen these, but just in case ...

Turned up on google using search term:
[ occurrence and properties of naturally occurring Pu-244 ]
Best,
Maury&Dog

http://repositories.cdlib.org/cgi/viewcontent.cgi?article=5135&context=lbnl

http://www.ead.anl.gov/pub/doc/Plutonium.pdf

http://www.stealthskater.com/Documents/Lazar_12.doc

==================================

Franta, Jaroslav wrote:

>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
>^^^^^^^^^^^^^^^^^^^^
>
>
>-----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 
>************************************************************************
>
>
>
>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.
>
>
>==================================
>
>  
>