Actions for Analytical approximations for x-ray cross sections III [electronic resource].

Email RIS file
Bookmark
Report an Issue

Analytical approximations for x-ray cross sections III [electronic resource].

Published
Albuquerque, N.M. : Sandia National Laboratories, 1988.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 137 : digital, PDF file
Additional Creators
Sandia National Laboratories and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
This report updates our previous work that provided analytical approximations to cross sections for both photoelectric absorption of photons by atoms and incoherent scattering of photons by atoms. This representation is convenient for use in programmable calculators and in computer programs to evaluate these cross sections numerically. The results apply to atoms of atomic numbers between 1 and 100 and for photon energiesgreater than or equal to10 eV. The photoelectric cross sections are again approximated by four-term polynomials in reciprocal powers of the photon energy. There are now more fitting intervals, however, than were used previously. The incoherent-scattering cross sections are based on the Klein-Nishina relation, but use simpler approximate equations for efficient computer evaluation. We describe the averaging scheme for applying these atomic results to any composite material. The fitting coefficients are included in tables, and the cross sections are shown graphically. 100 graphs, 1 tab.
Report Numbers
E 1.99:sand-87-0070
sand-87-0070
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
08/01/1988.
"sand-87-0070"
"DE88015366"
Biggs, F; Lighthill, R.
Funding Information
AC04-76DP00789
View MARC record | catkey: 13806455