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Re: Specific gamma-ray dose constant for 137Cs



There was a revision to the Unger and Trubey reference

(1981) that appeared in May 1982 due to an error in

the flux-to-dose equivalent factor.  The results were

too high.  They also mention a typographical error in

the Cs-137 values.  The gamma ray constant is listed

as 1.017 E-4.  This is equivalent to the value for

Ba-137m, which is 1.081 E-4.



--- Michael McNaughton <mcnaught@LANL.GOV> wrote:



> I cannot reproduce the specific gamma ray dose

> constant for Cs-137 in the 

> Rad Health Handbook (Table 6.2.2 of the 3rd edition

> or Table 6.1.2 of the 

> 1992 edition). I think it is about 10% too high.

> Could it be that Unger and 

> Trubey forgot about the internal conversion of

> Ba-137m (which happens in 

> 10% of the decays)? I would appreciate any insights.

> 

> mike

> Mike McNaughton

> Los Alamos National Lab.

> email: mcnaught@LANL.gov or mcnaughton@LANL.gov

> phone: 505-667-6130; page: 505-664-7733

> 

>

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=====

+++++++++++++++++++

"That government is the strongest of which every man feels himself a part."

Thomas Jefferson



-- John

John Jacobus, MS

Certified Health Physicist

e-mail:  crispy_bird@yahoo.com





		

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