Related Ci to Bq note

[Mike Lantz <mlantz33@cybertrails.com>]

Charly Frey wrote:

> Does somebody know a converter Curie to bequerel
 

This question reminded me of a note I wrote for RSO magazine a few years
ago that is somewhat related.  There is the 6CEn thumb rule for photon
dose rates(C=Curies, E=photon energy, n=yield). Although our facility
almost never has to use Becquerel units, we occasionally received
sources recorded in GBq.  I came up with a quick conversion factor for
photon dose rates that was fairly simple and still accurate:        
GEn/6

It's general basis is what was discussed previously.  The Curie to
Becquerel conversion is 3.7E10.  One Curie is 37 GBq (~6x6).  Long story
short, divide by 6 instead of multiplying by 6 and you have a new dose
rate conversion factor. 

Mike Lantz
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