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RE: C14 Natural abundance



Ed,

The percent abundance of C-14 in the environment is E-14 according to Clark, 
S.P., Jr., ed., 1966, Handbook of Physical Constants, Geological Society of 
America Memoir 97, pp 12-17.

Regards,
Gary Caines,
Radiological Operations Mgr.
Honeywell Inc.  IAC
gary.caines@iac.honeywell.com
 ----------
From: wilds@safety.ehs.uconn.edu
To: radsafe@romulus.ehs.uiuc.edu
Subject: C14 Natural abundance
Date: Thursday, October 09, 1997 9:53AM

Radsafers:
     Can someone complete the following table for the natural abundance of 
carbon isotopes in the environment and supply the reference.

     C12 - 98.89%
     C13 - 1.11%
     C14 - ?

I have seen a value for C14 of 0.0000000010%.  Is this familiar to anyone? 
 Thanks for the help.

Ed Wilds

+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*++*+*+*+*+*+*+*+
Edward L. Wilds, Jr., Ph.D.
The University of Connecticut
Department of Environmental Health & Safety
Radiation Safety Manager
233 Glenbrook Rd., U97
Storrs, CT  06269-4097
Ph. (860) 486-3613
Fax.(860) 486-1106
Email: Ehsadm3@uconnvm.uconn.edu
       Wilds@safety.ehs.uconn.edu