
					Jun 15 1999
					Bruce Ravel
					<ravel@phys.washington.edu>

This file and the files in this directory are distributed as part of
the Absorption.pm package.  Absorption.pm is a perl module providing
access to a variety of tables of x-ray absorption data for the
elements.

This directory contains calculations of atomic scattering factors as
calculated by Chris Chantler.

This data was taken from the interactive web page in the NIST Standard 
Data Reference Database (URL below) and saved as html files.  The html 
files were converted to the flat text files found in this directory
using the lynx (http://lynx.browser.org/) web browser.  The command
	lynx -dump -width=120 ??.html > ??.dat
was used for each ?? between 01 and 92.

Each data file contains scattering data as functions of energy as well 
as several other atomic properties of interest.  Edge energies but not 
fluorescence line energies are found in each file.  The file `lines'
contains the fluorescence line data from the McMaster tables -- a
minimal set of data sufficient for use with Absorption.pm.

The literature reference for this data is given among the URLs below.

No physical value has been added to the tables of Chris Chantler by
Bruce Ravel, the author of Absorption.pm.  All copyright on the data
in the tables belongs to Chris Chantler.  Absorption.pm is a synthesis
of several existing tables coded in an object oriented manner.

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Useful URLs:

Chris Chantler's homepage:
	http://optics.ph.unimelb.edu.au/~chantler/home.html

NIST Standard Reference Database 66 
NIST Form Factor, Attenuation, and Scattering Tables
  "Theoretical Form Factor, Attenuation, and Scattering Tabulation
   for Z = 1 - 92 from E = 1 - 10 eV to E = 0.4 - 1.0 MeV"
  C. T. Chantler, J. Phys. Chem. Ref. Data 24, 71 (1995) 
	http://physics.nist.gov/PhysRefData/FFast/Text/cover.html

Interactive access to the results of Chantler's calculations:
	http://physics.nist.gov/PhysRefData/FFast/html/form.html

Absorption.pm can be found at Bruce Ravel's "Perl Modules for X-ray
Absorption" web page:
	http://feff.phys.washington.edu/~ravel/Xray/
