Re: C14 Natural abundance

["David W. Lee" <lee_david_w@lanl.gov>]

Jean:  Carbon-14 is not "naturally abundant" because its half-life is not
on the order of the age of the earth, i.e., on the order of the half-life
of U-238 (4.5 billion years).  C-14 is however "naturally (cosmically)
produced."  For this information, see Eisenbud and Gesell, 4th Ed,
Environmentally Radioactivity, pages 549--550 which should help in your
calculation.  Best regards  David


At 03:45 AM 19-12-97 -0600, you wrote:
>Hi,
>
>I would like to work out what is  the amount of activity due to C14 in the
>human body.
>Can someone tell me what is the natural abundance of C14.
>
>Thanks,
>
>JM
>
>
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>Jean-Michel MURE
>ANDRA
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>
>
David W. Lee
Los Alamos National Laboratory
Radiation Protection Services Group (ESH-12)
PO Box 1663, MS K483
Los Alamos, NM  87545
PH:   (505) 667-8085
FAX:  (505) 667-9726
lee_david_w@lanl.gov