Triple differential cross sections for electron-impact ionization of methane at intermediate energy
Abstract
We report an experimental and theoretical investigation of electron-impact single ionization of the highest occupied molecular orbital 1t2 and the next highest occupied molecular orbital 2a1 states of CH4 at an incident electron energy of 250 eV. Triple differential cross sections measured in two different laboratories were compared with results calculated within the molecular 3-body distorted wave and generalized Sturmian function theoretical models. For ionization of the 1t2 state, the binary peak was observed to have a single maximum near the momentum transfer direction that evolved into a double peak for increasing projectile scattering angles, as has been seen for ionization of atomic p-states. A detailed investigation of this evolution was performed. As expected because of its s-type character, for ionization of the 2a1 state, only a single binary peak was observed. Altogether, good agreement was found between experiment and theory.
- Authors:
-
[1];
[2];
[3];
[4];
[3];
[5];
[6];
[7];
- Missouri Univ. of Science and Technology, Rolla, MO (United States)
- Martin-Luther Univ. Halle-Wittenberg, Halle(Saale) (Germany)
- Univ. of Manchester, Manchester (United Kingdom)
- Univ. de Lorraine, Metz (France)
- Ecol Academy, Afyon (Turkey)
- Tsinghua Univ., Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1532725
- Alternate Identifier(s):
- OSTI ID: 1513065
- Report Number(s):
- LA-UR-19-22828
Journal ID: ISSN 0021-9606
- Grant/Contract Number:
- 89233218CNA000001; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Chemical Physics
- Additional Journal Information:
- Journal Volume: 150; Journal Issue: 19; Journal ID: ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Ali, Esam, Granados, Carlos, Sakaamini, Ahmad, Harvey, Matthew, Ancarani, Lorenzo Ugo, Murray, Andrew James, Dogan, Mevlut, Ning, Chuangang, Colgan, James Patrick, and Madison, Don. Triple differential cross sections for electron-impact ionization of methane at intermediate energy. United States: N. p., 2019.
Web. doi:10.1063/1.5097670.
Ali, Esam, Granados, Carlos, Sakaamini, Ahmad, Harvey, Matthew, Ancarani, Lorenzo Ugo, Murray, Andrew James, Dogan, Mevlut, Ning, Chuangang, Colgan, James Patrick, & Madison, Don. Triple differential cross sections for electron-impact ionization of methane at intermediate energy. United States. https://doi.org/10.1063/1.5097670
Ali, Esam, Granados, Carlos, Sakaamini, Ahmad, Harvey, Matthew, Ancarani, Lorenzo Ugo, Murray, Andrew James, Dogan, Mevlut, Ning, Chuangang, Colgan, James Patrick, and Madison, Don. Thu .
"Triple differential cross sections for electron-impact ionization of methane at intermediate energy". United States. https://doi.org/10.1063/1.5097670. https://www.osti.gov/servlets/purl/1532725.
@article{osti_1532725,
title = {Triple differential cross sections for electron-impact ionization of methane at intermediate energy},
author = {Ali, Esam and Granados, Carlos and Sakaamini, Ahmad and Harvey, Matthew and Ancarani, Lorenzo Ugo and Murray, Andrew James and Dogan, Mevlut and Ning, Chuangang and Colgan, James Patrick and Madison, Don},
abstractNote = {We report an experimental and theoretical investigation of electron-impact single ionization of the highest occupied molecular orbital 1t2 and the next highest occupied molecular orbital 2a1 states of CH4 at an incident electron energy of 250 eV. Triple differential cross sections measured in two different laboratories were compared with results calculated within the molecular 3-body distorted wave and generalized Sturmian function theoretical models. For ionization of the 1t2 state, the binary peak was observed to have a single maximum near the momentum transfer direction that evolved into a double peak for increasing projectile scattering angles, as has been seen for ionization of atomic p-states. A detailed investigation of this evolution was performed. As expected because of its s-type character, for ionization of the 2a1 state, only a single binary peak was observed. Altogether, good agreement was found between experiment and theory.},
doi = {10.1063/1.5097670},
journal = {Journal of Chemical Physics},
number = 19,
volume = 150,
place = {United States},
year = {Thu May 16 00:00:00 EDT 2019},
month = {Thu May 16 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
Triple differential cross-section measurements for electron-impact ionization of methane from a coplanar geometry to the perpendicular plane
journal, November 2019
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