Re: Armchair Lawyering - XRAY Vision -Reply

[Lester.Slaback@nist.gov]

>Joyce's insightful "tentative ramblings" make several very good points.
>As input to these considerations, it would help to formally consider the
>distinction between a penetrating dose and the non-penetrating technology
>being used here; and to consider the true exposure and dose that is ...........

Since this unit depends on scattered radiation the energy must be high
enough that Compton interations are a significant effect, i.e., so that
the photoelectric 'wasted' interactions do not dominate the dose.  This
certainly would make it  'penetrating'.  Is this supposition true?

Also note that the Z dependence of compton scattering enhances detecting
materials with a higher Z than tissue.
 
-- 
the above are the personal musing of the author,
and do not represent any past, current, or future
position of NIST, the U.S. Government, or anyone else
who might think that they are in a position of authority.
NBSR Health Physics
NIST
Gaithersburg, MD 20899
301 975-5810
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Lester.Slaback@nist.gov
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