NAME

       Xray::Absorption::McMaster - Perl interface to the McMaster tables

SYNOPSIS

          use Xray::Absorption;
          Xray::Absorption -> load("mcmaster");

       See the documentation for Xray::Absorption for details.

DESCRIPTION

       This module is inherited by the Xray::Absorption module and provides access to the data
       contained in the 1969 McMaster tables.

       The data in this module, commonly referred to as "The McMaster Tables", was originally
       published as

         Compilation of X-Ray Cross Sections
         W.H. McMster, N. Kerr Del Grande, J.H. Mallett, J.H. Hubbell
         National Bureau of Standards
         UCRL-50174 Section II Revision 1
         (1969)
         Available from National Technical Information Services L-3
         United States Department of Commerce

       This can be a bit difficult to find.  IIT's Galvin library has kindly made a scan of it
       available: http://www.gl.iit.edu/govdocs/resources/xray.html

       The data is contained in a database file called mcmaster.db which is generated at install
       time from a flat text database of the McMster data.  The data originally comes from
       mucal.f, a Fortran subroutine originally written by Dr. Pathikrit Bandhyapodhyay.

       The required Chemistry::Elements module is available from CPAN in the miscellaneous
       modules section.

EDGE AND LINE ENERGIES

       The McMaster data resource only includes K and L 1-3 edges.  For light elements, it
       provides only a single L edge energy -- that for the L1 edge.  For heavier elements it
       provides a single M energy, the energy of the M1 edge.  It only supplies four generic
       fluorescence line energies, Kalpha, Kbeta, Lalpha, and Lbeta.  In each case the energy
       provided is the energy of the brightest line of that sort.

BUGS AND THINGS TO DO

       •   Make sure this handles fluorescence lines which are in other resources, but not in
           this resource in a sensible manner.

       •   What happens if you call "line_toggle" when this is loaded?  How about when elam was
           loaded but then you switch to this one?

AUTHOR

         Bruce Ravel, bruce@phys.washington.edu
         http://feff.phys.washington.edu/~ravel/software/Absorption/