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Title: Calculation of energy relaxation rates of fast particles by phonons in crystals

Abstract

We present ab initio calculations of the temperature-dependent exchange of energy between a classical charged point-particle and the phonons of a crystalline material. The phonons, which are computed using density functional perturbation theory (DFPT) methods, interact with the mov- ing particle via the Coulomb interaction between the density induced in the material by phonon excitation and the charge of the classical particle. Energy relaxation rates are computed using time- dependent perturbation theory. The method, which is applicable wherever DFPT is, is illustrated with results for CsI, an important scintillator whose performance is affected by electron thermal- ization. We discuss the influence of the form assumed for quasiparticle dispersion on theoretical estimates of electron cooling rates.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1188895
Report Number(s):
PNNL-SA-106420
NN2001000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter, 91(10):Article No. 104305
Country of Publication:
United States
Language:
English
Subject:
electron-phonon interaction, scintillators

Citation Formats

Prange, Micah P., Campbell, Luke W., Wu, Dangxin, Gao, Fei, and Kerisit, Sebastien N.. Calculation of energy relaxation rates of fast particles by phonons in crystals. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.104305.
Prange, Micah P., Campbell, Luke W., Wu, Dangxin, Gao, Fei, & Kerisit, Sebastien N.. Calculation of energy relaxation rates of fast particles by phonons in crystals. United States. doi:10.1103/PhysRevB.91.104305.
Prange, Micah P., Campbell, Luke W., Wu, Dangxin, Gao, Fei, and Kerisit, Sebastien N.. Sun . "Calculation of energy relaxation rates of fast particles by phonons in crystals". United States. doi:10.1103/PhysRevB.91.104305.
@article{osti_1188895,
title = {Calculation of energy relaxation rates of fast particles by phonons in crystals},
author = {Prange, Micah P. and Campbell, Luke W. and Wu, Dangxin and Gao, Fei and Kerisit, Sebastien N.},
abstractNote = {We present ab initio calculations of the temperature-dependent exchange of energy between a classical charged point-particle and the phonons of a crystalline material. The phonons, which are computed using density functional perturbation theory (DFPT) methods, interact with the mov- ing particle via the Coulomb interaction between the density induced in the material by phonon excitation and the charge of the classical particle. Energy relaxation rates are computed using time- dependent perturbation theory. The method, which is applicable wherever DFPT is, is illustrated with results for CsI, an important scintillator whose performance is affected by electron thermal- ization. We discuss the influence of the form assumed for quasiparticle dispersion on theoretical estimates of electron cooling rates.},
doi = {10.1103/PhysRevB.91.104305},
journal = {Physical Review. B, Condensed Matter, 91(10):Article No. 104305},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}