State selectivity in core ionization of methane
A clear experimental signature of the population of the lowest triplet state ^{3}T_{1} of the methane dication is identified in a photoionization experiment. This state is populated only in valence ionization and is absent when the dication is formed by core ionization followed by Auger-Meitner deca...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.L022021 |
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| author | J. Rajput J. Stindl A. Cassimi B. Gervais M. Kircher G. Kastirke O. D. McGinnis R. Enoki J. B. Williams V. Davis R. Saha S. Kumar O. Kostko M. Shaikh Th. Weber D. S. Slaughter N. Iwamoto C. Bagdia I. Ben-Itzhak M. S. Schöffler C. P. Safvan |
| author_facet | J. Rajput J. Stindl A. Cassimi B. Gervais M. Kircher G. Kastirke O. D. McGinnis R. Enoki J. B. Williams V. Davis R. Saha S. Kumar O. Kostko M. Shaikh Th. Weber D. S. Slaughter N. Iwamoto C. Bagdia I. Ben-Itzhak M. S. Schöffler C. P. Safvan |
| author_sort | J. Rajput |
| collection | DOAJ |
| description | A clear experimental signature of the population of the lowest triplet state ^{3}T_{1} of the methane dication is identified in a photoionization experiment. This state is populated only in valence ionization and is absent when the dication is formed by core ionization followed by Auger-Meitner decay. For valence ionization, the total internal energy of the CH_{3}^{+} fragment, formed during the deprotonation of CH_{4}^{2+}, is evaluated. Notably, the distribution of this internal energy peaks at the same value regardless of the initially populated electronic state of CH_{4}^{2+}. We find that excited electronic states of CH_{3}^{+} are predominantly populated with significant rovibrational excitation. |
| format | Article |
| id | doaj-art-2e154ce05ba44b9791d18ff41a7ae988 |
| institution | DOAJ |
| issn | 2643-1564 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj-art-2e154ce05ba44b9791d18ff41a7ae9882025-08-20T03:14:47ZengAmerican Physical SocietyPhysical Review Research2643-15642025-04-0172L02202110.1103/PhysRevResearch.7.L022021State selectivity in core ionization of methaneJ. RajputJ. StindlA. CassimiB. GervaisM. KircherG. KastirkeO. D. McGinnisR. EnokiJ. B. WilliamsV. DavisR. SahaS. KumarO. KostkoM. ShaikhTh. WeberD. S. SlaughterN. IwamotoC. BagdiaI. Ben-ItzhakM. S. SchöfflerC. P. SafvanA clear experimental signature of the population of the lowest triplet state ^{3}T_{1} of the methane dication is identified in a photoionization experiment. This state is populated only in valence ionization and is absent when the dication is formed by core ionization followed by Auger-Meitner decay. For valence ionization, the total internal energy of the CH_{3}^{+} fragment, formed during the deprotonation of CH_{4}^{2+}, is evaluated. Notably, the distribution of this internal energy peaks at the same value regardless of the initially populated electronic state of CH_{4}^{2+}. We find that excited electronic states of CH_{3}^{+} are predominantly populated with significant rovibrational excitation.http://doi.org/10.1103/PhysRevResearch.7.L022021 |
| spellingShingle | J. Rajput J. Stindl A. Cassimi B. Gervais M. Kircher G. Kastirke O. D. McGinnis R. Enoki J. B. Williams V. Davis R. Saha S. Kumar O. Kostko M. Shaikh Th. Weber D. S. Slaughter N. Iwamoto C. Bagdia I. Ben-Itzhak M. S. Schöffler C. P. Safvan State selectivity in core ionization of methane Physical Review Research |
| title | State selectivity in core ionization of methane |
| title_full | State selectivity in core ionization of methane |
| title_fullStr | State selectivity in core ionization of methane |
| title_full_unstemmed | State selectivity in core ionization of methane |
| title_short | State selectivity in core ionization of methane |
| title_sort | state selectivity in core ionization of methane |
| url | http://doi.org/10.1103/PhysRevResearch.7.L022021 |
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