[ RadSafe ] Ra-226 Activity in Vintage Compass
gelsg at aol.com
gelsg at aol.com
Fri Jul 18 16:06:52 CDT 2014
I agree. A reading at one meter should give you pretty good information with which to calculate the activity of the source.
I would only add that, to get the best number, the compass should be encased in a leak-tight container for 2 - 3 weeks before making the measurement. This would allow the short-lived radon daughters, which contribute significantly to the gamma activity, to achieve equilibrium.
From: Joseph Shonka <jjshonka at shonka.com>
To: The International Radiation Protection (Health Physics) Mailing List <radsafe at health.phys.iit.edu>
Sent: Fri, Jul 18, 2014 1:32 pm
Subject: Re: [ RadSafe ] Ra-226 Activity in Vintage Compass
Measure the exposure rate at a meter. I have had similar instruments with
On Fri, Jul 18, 2014 at 1:20 PM, Roy Parker <radmail at cox.net> wrote:
> I am trying to move a shipment containing a World War I vintage compass:
> U.S.E.D. Creagh - Osborne Marching Compass Mark VII Model E Sperry
> Gyroscope Brooklyn, N.Y.
> It is radioactive, therefore obviously Ra-226. I am trying to find the
> Roy A. Parker, Ph.D.
> Radiation Physics Consultant
> 225-924-1473 Office
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