PARAMETRIZATION OF THE TOTAL PHOTON MASS ATTENUATION COEFFICIENTS IN THE ENERGY-RANGE 0.1-1000 KEV

Citation
I. Orlic et al., PARAMETRIZATION OF THE TOTAL PHOTON MASS ATTENUATION COEFFICIENTS IN THE ENERGY-RANGE 0.1-1000 KEV, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 74(3), 1993, pp. 352-361
Citations number
27
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
ISSN journal
0168583X
Volume
74
Issue
3
Year of publication
1993
Pages
352 - 361
Database
ISI
SICI code
0168-583X(1993)74:3<352:POTTPM>2.0.ZU;2-D
Abstract
It is convenient to generate mass attenuation coefficients using semi- empirical schemes. The validity of most of the existing schemes is lim ited to a relatively narrow energy interval (1-40 keV) and their accur acies are poor in some energy regions. In this work, a semi-empirical scheme flexible enough to give a good fit to data in a very wide photo n energy range (0.1-1000 keV) was employed. Fitting coefficients for t he entire range were obtained by utilizing mass attenuation data from two sources: (1) semi-empirical data of Henke et al. in the low photon energy region, and (2) theoretical values generated with the XCOM cod e for fitting in the high energy region. The root mean square of the f it is generally less than 0.2% except for energies below 1 keV where t he available data are scattered. A computer code for generating mass a ttenuation coefficients based on the proposed scheme has been develope d.