[ RadSafe ] Adopting the International System of Units for Radiation Measurements in the United States

Mike Brennan mikebrennan90 at hotmail.com
Tue Sep 13 01:42:02 CDT 2016

If we could give up Ci and go to Bq, the rest is easy.

From: radsafe-bounces at health.phys.iit.edu <radsafe-bounces at health.phys.iit.edu> on behalf of Joseph Shonka <jjshonka at shonka.com>
Sent: Monday, September 12, 2016 11:46 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] Adopting the International System of Units for Radiation Measurements in the United States

When I was in school (less than 100 years ago), there was cgs and mks units
under the metric system.  The EU standardized on meter-kilogram-second
forcing 100 fold change in rad units (old units approximately (for photons,
1R = 1 rad = 1 rem = 1 esu/cc).  Why kilogram is a base unit and gram is
not a base unit is beyond my pay grade, but was likely because people want
change to seem like we are making progress.  I really miss 6CE = R/hr at a
meter from a point source, and VE = R/hr at 1 meter from a semi-infinite
source (V = Ci/g), and all of the other useful rules of thumb.

Joe Shonka

On Mon, Sep 12, 2016 at 1:08 PM, Mike Brennan <mikebrennan90 at hotmail.com>

> Preach it, Brother, Preach it!
> It is time and past time to switch to SI for radiation measurements (Full
> disclosure: I can still tough the feel of betrayal that I felt when I
> learned about the Metric System, and that it had been available or over 100
> year, and the US hadn't switched to it).
> It really wouldn't be hard, as we already use SI mass and volume.
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