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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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Authors (12)
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Robert Wright
- California State University, Fullerton
-
Grant Dolmat
- California State University, Fullerton
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Merl Martin
- California State University, Fullerton
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Leigh Hargreaves
- California State University, Fullerton
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Dmitry Fursa
- Curtin University
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Mark Zammit
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Liam Scarlett
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Jonathan Tapley
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Jeremy Savage
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Igor Bray
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Murtadha Khakoo
- California State University, Fullerton
Cite as
Full text
- Publication version
- Accepted or Published Version
- License
- Copyright (2018 American Physical Society)
Keywords
Details
- Category:
- Articles
- 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
- Verified by:
- Gdańsk University of Technology
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