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Resonant neutron-induced atomic displacements

Authors :
Elsayed K. Elmaghraby
Source :
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 398:42-47
Publication Year :
2017
Publisher :
Elsevier BV, 2017.

Abstract

A model for displacement cascade function was modified to account for the continuous variation of displacement density in the material in response to neutron exposure. The model is based on the Gaussian distribution of displacement energies of atoms in a material. Analytical treatment for moderated epithermal neutron field was given in which the displacement density was divided into two terms, discrete-resonance term and continuum term. Calculation are done for all isotopes using ENDF/B VII.1 data files and temperature dependent cross section library. Weighted elemental values were reported a fitting was performed to obtain energy-dependent formula of displacement density and reduce the number of parameters. Results relevant the present specification of the cascade function are tabulated for each element to enable calculation of displacement density at any value of displacement energy in the between 5 eV and 55 eV.

Details

ISSN :
0168583X
Volume :
398
Database :
OpenAIRE
Journal :
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Accession number :
edsair.doi...........ac006daa04cf8b42f08dc02337ee7dc4
Full Text :
https://doi.org/10.1016/j.nimb.2017.03.054