Shielding for Pd-103 -Reply

[Charles Willis <CAW@nrc.gov>]

Paul,

I believe that shielding Pd-103 is a little tricky.  That is, for thin shields the
concern is the dose from soft (22.7 keV or less) X rays for which the tenth value
layer is about 0.3 gm/(square cm).  For thicker shields, the 500 keV gammas
become dominant and the tenth value layer is about 28 gm/(square cm) and a
buildup factor correction is needed.

Charlie Willis
caw@nrc.gov
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