Xray::Scattering::None(3pm) User Contributed Perl Documentation Xray::Scattering::None(3pm)NAME
Xray::Scattering::None - Fallback methods for Xray::Scattering
SYNOPSIS
use Xray::Scattering;
Xray::Scattering->load('None');
$fnot = Xray::Scattering->get_f($symb, $d);
DESCRIPTION
This module provides a fallback subclass for the Xray::Scattering methods. It provides all the methods of the real subclasses, but returns
fallback values.
METHODS
"get_f"
Retruns 0.
"get_coefficients"
returns an array of 11 zeros.
"has"
Always returns the symbol itself.
AUTHOR
Bruce Ravel, bravel AT bnl DOT gov
http://cars9.uchicago.edu/~ravel/software/exafs/
perl v5.12.4 2011-07-30 Xray::Scattering::None(3pm)
Check Out this Related Man Page
Xray::Absorption::Shaltout(3pm) User Contributed Perl Documentation Xray::Absorption::Shaltout(3pm)
"cross_section"
Example:
$xsec = Xray::Absorption -> cross_section($elem, $energy, $mode);
@xsec = Xray::Absorption -> cross_section($elem, @energy, $mode);
The $mode argument is different here than for the other resources. The options are "xsec", "photo", "coherent" and "incoherent",
telling this method to return the full cross-section or just the photoelectric, coherent, or incoherent portions.
The values for all cross-sections are computed as log-log polynomials as described in the original paper by Shaltout et al.
NAME
Xray::Absorption::Shaltout - Perl interface to the Shaltout tables
SYNOPSIS
use Xray::Absorption;
Xray::Absorption -> load("shaltout");
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
Update of photoelectric absorption coefficients in the tables of McMaster
Abdallah Shaltout, Horst Ebel, and Robert Svagera
X-Ray Spectrometry(2006) vol. 35, p. 52-56
The data is contained in a database file called shaltout.db which is generated at install time from a flat text database of the data which
can be found at <http://www.ifp.tuwien.ac.at/forschung/abdallah.shaltout/> as explained in the reference.
The required Chemistry::Elements module is available from CPAN in the miscellaneous modules section.
EDGE AND LINE ENERGIES
The Shaltout data resource includes all K, L, M, and N edges but does not provide any of the line energies. An minimal set of line
energies is imported from the McMaster data resource.
BUGS AND THINGS TO DO
This module has not be tested sufficiently.
AUTHOR
Bruce Ravel, bravel@bnl.gov
http://cars9.uchicago.edu/~ravel/software/Absorption/
perl v5.12.4 2011-07-30 Xray::Absorption::Shaltout(3pm)
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