Triple differential cross sections for electron-impact ionization of methane at intermediate energy
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 di...
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| Veröffentlicht in: | The Journal of chemical physics 2019-05, Vol.150 (19), p.194302-194302 |
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| container_title | The Journal of chemical physics |
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| creator | Ali, Esam Granados, Carlos Sakaamini, Ahmad Harvey, Matthew Ancarani, Lorenzo Ugo Murray, Andrew James Dogan, Mevlut Ning, Chuangang Colgan, James Madison, Don |
| description | 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. Overall, good agreement was found between experiment and theory. |
| doi_str_mv | 10.1063/1.5097670 |
| format | Article |
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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. Overall, good agreement was found between experiment and theory.</description><identifier>ISSN: 0021-9606</identifier><identifier>EISSN: 1089-7690</identifier><identifier>DOI: 10.1063/1.5097670</identifier><identifier>PMID: 31117797</identifier><identifier>CODEN: JCPSA6</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>Atomic properties ; Chemical Sciences ; Electron energy ; Electron impact ; Evolution ; Ionization ; Ionization cross sections ; Methane ; Molecular orbitals ; Momentum transfer ; Physics ; Projectiles ; Scattering angle</subject><ispartof>The Journal of chemical physics, 2019-05, Vol.150 (19), p.194302-194302</ispartof><rights>Author(s)</rights><rights>2019 Author(s). 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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. 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| ispartof | The Journal of chemical physics, 2019-05, Vol.150 (19), p.194302-194302 |
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| source | 美国小型学会期刊集（AIP Scitation平台）; Alma/SFX Local Collection |
| subjects | Atomic properties Chemical Sciences Electron energy Electron impact Evolution Ionization Ionization cross sections Methane Molecular orbitals Momentum transfer Physics Projectiles Scattering angle |
| title | Triple differential cross sections for electron-impact ionization of methane at intermediate energy |
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