A semiempirical model for low energy electron–atom transport cross sections: The case of noble gases

Felipe Arretche; Eliton Popovicz Seidel; Wagner Tenfen

doi:10.1016/j.elspec.2024.147476

A semiempirical model for low energy electron–atom transport cross sections: The case of noble gases

Abstract

A semiempirical approach to describe low energy electron–atom transport cross sections of easy implementation and reproduction is presented. The heart of the model is an energy independent two-parameter potential that was adjusted to reproduce the accurate total cross sections for He, Ne, Ar and Kr, measured with a threshold photoelectron source technique from meV up to 20 eV. Once the potential was conceived, the model was validated by comparing the values obtained for the calculated scattering lengths and phase shifts with the respective quantities previously reported in the literature. We close the article by presenting the momentum transfer and viscosity cross sections. Good agreement is found when compared to the similar data obtained from swarm experiments, from phase shifts according to differential cross section measurements and to the cross sections reported by sophisticated ab initio relativistic many-body calculations. Tables for the phase shifts and cross sections are provided for direct use and applications.

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Authors (3)

Felipe Arretche
- Universidade Federal de Santa Catarina / Brazil
Eliton Popovicz Seidel dr
Wagner Tenfen
- Universidade Federal de Pelotas / Brazil

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Articles

Type:

artykuły w czasopismach

Published in:

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA no. 275,
ISSN: 0368-2048

Language:

English

Publication year:

2024

Bibliographic description:

Arretche F., Popovicz Seidel E., Tenfen W.: A semiempirical model for low energy electron–atom transport cross sections: The case of noble gases// JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA -Vol. 275, (2024), s.147476-

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