Re: dose rate from plane source

["radware" <tom_dixie@email.msn.com>]

Michael,

Regarding the plane source equation:

How far away from the plane is the determination of dose rate ?

What parameters do you need to make it apply to varying distances from the
plane?

How big is the plane?

Why pi, is the plane circular?

Need to show your derivation.

Tom O'Dou
tom_dixie@msn.com

-----Original Message-----
From: Michael McNaughton <mcnaught@lanl.gov>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Date: Tuesday, September 14, 1999 11:18 AM
Subject: dose rate from plane source


>I have not seen a rule of thumb for the dose rate for a plane source, so I
>derived the following simple rule of thumb.
>If E is the average gamma energy per emission in MeV,
>a is the activity in Ci/m^3,
>h is the half-value layer in meters,
>pi = 3.14, and ln(2) = 0.693,
>then the dose rate in R/h = (pi)(E)(a)(h)/ln(2)
>
>I would appreciate any comments.
>
>mike
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