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Re: Specific Gamma Ray Constant for Ra-226
There was a very old rule of thumb which, I believe, derived from
radium. It was 1 Ci gives 1 R/hour at 1 meter (the R was Roentgen, but it
is close to Rad). This would support the 0.825 figure.
Bernard L. Cohen
Physics Dept.
University of Pittsburgh
Pittsburgh, PA 15260
Tel: (412)624-9245
Fax: (412)624-9163
e-mail: blc@pitt.edu
On Mon, 3 Mar 2003, Toli Mikell wrote:
> While researching the specific gamma ray constant for radium-226, I noticed two different figures, 0.825 R/hr at 1m/Ci and 0.0121138 R/hr at 1m/Ci. Can someone provide some clarity on this for me? The issue in question is about Ra-226 needles. You may respond privately at tmikell@excite.com. Thanks, Toli Mikell
>
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