Re: Build -up and photon interaction data

[David Scherer <scherer@uiuc.edu>]

At 08:37 PM 10/9/96 -0500, you wrote:
>We are looking for  WWW sites that have the
>most up to date build-up factors and 
>photon interaction (photoelectric, Compton and
>Pair production) in different absorber materials.
>
One source of photon interaction cross sections is mucal (mu, as in
absorption coefficient) on the web.  You give it element and photon energy,
it gives you the various interaction coefficients.  URL is
http://www.csrri.iit.edu/mucal.html

The ANS home page has information about ordering ANS-6.4.3-1991, Gamma-Ray
Attenuation Coefficients and Buildup Factors for Engineering Materials.  URL is
http://www.ans.org/pubs/standards/

There are numerous sources for codes you can acquire that will provide
and/or use this information for shielding calculations.  The cheapest source
is probably RSICC, formerlly RSIC.  You can perform a search of their
software library.  URL is
http://epicws.epm.ornl.gov/rsic.html

Good luck.
Dave Scherer
scherer@uiuc.edu