Time-of-flight electron scattering from molecular hydrogen: Benchmark cross sections for excitation of the X1Σ+g→b3Σ+u transition - Publication - MOST Wiedzy

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Time-of-flight electron scattering from molecular hydrogen: Benchmark cross sections for excitation of the X1Σ+g→b3Σ+u transition

Abstract

The electron impact X1Σ+g to b3Σ+u transition in molecular hydrogen is one of the most important dissociation pathways to forming atomic hydrogen atoms, and is of great importance in modeling astrophysical and industrial plasmas where molecular hydrogen is a substantial constituent. Recently it has been found that the convergent close-coupling (CCC) cross sections of Zammit et al. [Phys. Rev. A 95, 022708 (2017)] are up to a factor of two smaller than the currently recommended data. We have performed measurements of differential cross sections as ratios of the excitation to elastic scattering using a transmission-free time-of-flight electron spectrometer, and find excellent agreement with the CCC calculations. Since there is already excellent agreement for the absolute elastic differential cross sections, we establish new recommended differential and integrated cross sections with theory and experiment being essentially in complete agreement- unprecedented for differential electron impact excitation of any molecular transition to date.

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Copyright (2018 American Physical Society)

Details

Category:
Magazine publication
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
PHYSICAL REVIEW A no. 97, edition 5, pages 1 - 6,
ISSN: 2469-9926
Language:
English
Publication year:
2018
Bibliographic description:
Zawadzki M., Wright R., Dolmat G., Martin M., Hargreaves L., Fursa D., Zammit M., Scarlett L., Tapley J., Savage J., Bray I., Khakoo M.: Time-of-flight electron scattering from molecular hydrogen: Benchmark cross sections for excitation of the X1Σ+g→b3Σ+u transition// PHYSICAL REVIEW A. -Vol. 97, iss. 5 (2018), s.1-6
DOI:
Digital Object Identifier (open in new tab) 10.1103/physreva.97.050702
Sources of funding:
  • Stypendium Fulbrighta
Verification:
Gdańsk University of Technology

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