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Title: Simulation of nonlinear Compton scattering from bound electrons

Abstract

Recent investigations by Fuchs et al. [Nat. Phys. 11, 964 (2015)] revealed an anomalous frequency shift in non-linear Compton scattering of high-intensity X-rays by electrons in solid beryllium. This frequency shift was at least 800 eV to the red of the values predicted by analytical free-electron models for the same process. Here, we describe a method for simulating non-linear Compton scattering. The method is applied to the case of bound electrons in a local, spherical potential to explore the role of binding energy in the frequency shift of scattered X-rays for different scattered angles. The results of the calculation do not exhibit an additional redshift for the scattered X-rays beyond the non-linear Compton shift predicted by the free-electron model. However, it does reveal a small blue-shift relative to the free electron prediction for non-linear Compton scattering. The effect of electron-electron correlation effects is calculated and determined to be unlikely to be the source of the redshift. Lastly, the case of linear Compton scattering from a photoionized electron followed by electron recapture is examined as a possible source of the redshift and ruled out.

Authors:
 [1]; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States)
Publication Date:
Research Org.:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1582610
Grant/Contract Number:  
SC0012193
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 101; Journal Issue: 1; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Compton scattering

Citation Formats

Venkatesh, Akilesh, and Robicheaux, Francis. Simulation of nonlinear Compton scattering from bound electrons. United States: N. p., 2020. Web. doi:10.1103/PhysRevA.101.013409.
Venkatesh, Akilesh, & Robicheaux, Francis. Simulation of nonlinear Compton scattering from bound electrons. United States. https://doi.org/10.1103/PhysRevA.101.013409
Venkatesh, Akilesh, and Robicheaux, Francis. Thu . "Simulation of nonlinear Compton scattering from bound electrons". United States. https://doi.org/10.1103/PhysRevA.101.013409. https://www.osti.gov/servlets/purl/1582610.
@article{osti_1582610,
title = {Simulation of nonlinear Compton scattering from bound electrons},
author = {Venkatesh, Akilesh and Robicheaux, Francis},
abstractNote = {Recent investigations by Fuchs et al. [Nat. Phys. 11, 964 (2015)] revealed an anomalous frequency shift in non-linear Compton scattering of high-intensity X-rays by electrons in solid beryllium. This frequency shift was at least 800 eV to the red of the values predicted by analytical free-electron models for the same process. Here, we describe a method for simulating non-linear Compton scattering. The method is applied to the case of bound electrons in a local, spherical potential to explore the role of binding energy in the frequency shift of scattered X-rays for different scattered angles. The results of the calculation do not exhibit an additional redshift for the scattered X-rays beyond the non-linear Compton shift predicted by the free-electron model. However, it does reveal a small blue-shift relative to the free electron prediction for non-linear Compton scattering. The effect of electron-electron correlation effects is calculated and determined to be unlikely to be the source of the redshift. Lastly, the case of linear Compton scattering from a photoionized electron followed by electron recapture is examined as a possible source of the redshift and ruled out.},
doi = {10.1103/PhysRevA.101.013409},
journal = {Physical Review A},
number = 1,
volume = 101,
place = {United States},
year = {2020},
month = {1}
}

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