[ RadSafe ] Re: Linac Shield calculation/NCRP 151 and others..

JPreisig at aol.com JPreisig at aol.com
Mon Jul 6 08:53:43 CDT 2009

Hi Radsafers and Mark Ramsay,

     Perhaps, for the case of gammas/photons interacting with a concrete 
wall, one might need to include Buildup factors in the hand calculation.
For information on Buildup factors, please refer to Cember, the original 
Rad Health
Handbook <USA>, Schleien's version of the Rad Health Handbook, etc.
A factor of 2 might sound right for such a Buildup factor.

     Please do this calculation yourself if possible.  

     Best wishes...        Regards,    Joseph R. <Joe> Preisig, Ph.D.

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