Re: C14 Natural abundance

[Chris Alston <alstonc@odrge.odr.georgetown.edu>]

C14 is "naturally abundant" in the sense that there are both human sources
(nuke weapons tests) and nonhuman. Eisenbud and Gesell give a natural
abundance of 6.1 pCi/g.

chris alston

At 09:34  12/19/97 -0600, you wrote:
>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
>>
>>
>>***************************************************
>>Jean-Michel MURE
>>ANDRA
>>DSU/SR/Radiological Protection and Environmental Surveillance
>>Parc de la Croix Blanche
>>1-7, rue Jean Monnet
>>92298 CHATENAY MALABRY Cedex
>>FRANCE
>>****************************************************
>>Tel : 01 46 11 83 74
>>Fax : 01 46 11 80 13
>>****************************************************
>>Email : jm.mure@andra.fr
>>****************************************************
>>
>>
>>
>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
>