Triple differential cross sections for electron-impact ionization of methane at intermediate energy
| Autor: | Andrew James Murray, Chuangang Ning, Matthew Harvey, Esam Ali, Carlos Granados, Lorenzo Ugo Ancarani, Mevlut Dogan, D. H. Madison, James Colgan, Ahmad Sakaamini |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
010304 chemical physics Projectile Scattering Momentum transfer General Physics and Astronomy Binary number 010402 general chemistry 01 natural sciences 0104 chemical sciences Ionization 0103 physical sciences Energy level Physical and Theoretical Chemistry Atomic physics HOMO/LUMO Electron ionization |
| Zdroj: | Ali, E, Granados, C, Sakaamini, A, Harvey, M, Ancarani, L U, Murray, A, Dogan, M, Ning, C, Colgan, J & Madison, D 2019, ' Triple Differential Cross Sections for electron-impact ionization of methane at intermediate energy ', Journal of Chemical Physics . https://doi.org/10.1063/1.5097670 |
| ISSN: | 1089-7690 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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