[ RadSafe ] Ancient background radiation

Scott, Bobby BScott at lrri.org
Sat Aug 27 13:56:27 CDT 2011

The following is a useful reference:

Karam PA and Leslie SA (1999). Calculation of background beta-gamma radiation dose through geologic time. Health Physics 77(6):662667.

Bobby R. Scott
Lovelace Respiratory Research Institute
Albuquerque, NM, USA

-----Original Message-----
From: Kulp, Jeffrey B [mailto:kulpjb at wsu.edu] 
Sent: Friday, August 26, 2011 9:19 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [ RadSafe ] Ancient background radiation

Hello Radsafers,

I once read that background radiation from terrestrial sources was estimated to be approximately an order of magnitude greater than its current level; due to relatively short lived transuranics that decayed to U and Th. I have tried to find references to this; I have been unsuccessful. Has anyone else heard or read this, and can you point me in the direction of documents or a website that contains the information?


Jeff Kulp
Washington State University
Radiation Safety Office
Pullman, WA 99164-1302
(509) 335-8175


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