Elastic Electron Scattering from Methane Molecule in the Energy Range from 50-300 eV

Electron interaction with methane molecule and accurate determination of its elastic cross-section is a demanding task for both experimental and theoretical standpoints and relevant for our better understanding of the processes in Earth's and Solar outer planet atmospheres, the greenhouse effec...

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Published inInternational journal of molecular sciences Vol. 22; no. 2; p. 647
Main Authors Vukalović, Jelena, Maljković, Jelena B, Tökési, Karoly, Predojević, Branko, Marinković, Bratislav P
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 11.01.2021
MDPI
Subjects
Algorithms
Approximation
Channel multipliers
cross-section
Cross-sections
Dusty plasmas
Elastic scattering
Electron guns
Electron scattering
Electrons
Energy
Greenhouse effect
Methane
Methane - chemistry
Models, Theoretical
Momentum transfer
Planetary atmospheres
Plasma
Plasma physics
Scattering, Radiation
Solar system
Vapor deposition
cross-section
methane
elastic scattering
electrons
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Summary:Electron interaction with methane molecule and accurate determination of its elastic cross-section is a demanding task for both experimental and theoretical standpoints and relevant for our better understanding of the processes in Earth's and Solar outer planet atmospheres, the greenhouse effect or in plasma physics applications like vapor deposition, complex plasma-wall interactions and edge plasma regions of Tokamak. Methane can serve as a test molecule for advancing novel electron-molecule collision theories. We present a combined experimental and theoretical study of the elastic electron differential cross-section from methane molecule, as well as integral and momentum transfer cross-sections in the intermediate energy range (50-300 eV). The experimental setup, based on a crossed beam technique, comprising of an electron gun, a single capillary gas needle and detection system with a channeltron is used in the measurements. The absolute values for cross-sections are obtained by relative-flow method, using argon as a reference. Theoretical results are acquired using two approximations: simple sum of individual atomic cross-sections and the other with molecular effect taken into the account.
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ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms22020647