Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact
We introduce two models for the computation of direct ionization cross sections by positron impact over a wide range of collision energies. The models are based on the binary-encounter-Bethe model and take into account an extension of the Wannier theory. The cross sections computed with these models...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Atoms |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-2004/9/4/99 |
| _version_ | 1827674156860178432 |
|---|---|
| author | Małgorzata Franz Katarzyna Wiciak-Pawłowska Jan Franz |
| author_facet | Małgorzata Franz Katarzyna Wiciak-Pawłowska Jan Franz |
| author_sort | Małgorzata Franz |
| collection | DOAJ |
| description | We introduce two models for the computation of direct ionization cross sections by positron impact over a wide range of collision energies. The models are based on the binary-encounter-Bethe model and take into account an extension of the Wannier theory. The cross sections computed with these models show good agreement with experimental data. The extensions improve the agreement between theory and experiment for collision energies between the first ionization threshold and the peak of the cross section. The models are based on a small set of parameters, which can be computed with standard quantum chemistry program packages. |
| first_indexed | 2024-03-10T04:35:40Z |
| format | Article |
| id | doaj.art-5c4691c148244d689a529f5aa7a7c43f |
| institution | Directory Open Access Journal |
| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-10T04:35:40Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atoms |
| spelling | doaj.art-5c4691c148244d689a529f5aa7a7c43f2023-11-23T03:48:11ZengMDPI AGAtoms2218-20042021-11-01949910.3390/atoms9040099Binary-Encounter Model for Direct Ionization of Molecules by Positron-ImpactMałgorzata Franz0Katarzyna Wiciak-Pawłowska1Jan Franz2Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, 80-233 Gdańsk, PolandFaculty of Applied Physics and Mathematics, Gdańsk University of Technology, 80-233 Gdańsk, PolandFaculty of Applied Physics and Mathematics, Gdańsk University of Technology, 80-233 Gdańsk, PolandWe introduce two models for the computation of direct ionization cross sections by positron impact over a wide range of collision energies. The models are based on the binary-encounter-Bethe model and take into account an extension of the Wannier theory. The cross sections computed with these models show good agreement with experimental data. The extensions improve the agreement between theory and experiment for collision energies between the first ionization threshold and the peak of the cross section. The models are based on a small set of parameters, which can be computed with standard quantum chemistry program packages.https://www.mdpi.com/2218-2004/9/4/99positron impact ionizationpositron-molecule scatteringbinary-encounter-Bethe |
| spellingShingle | Małgorzata Franz Katarzyna Wiciak-Pawłowska Jan Franz Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact Atoms positron impact ionization positron-molecule scattering binary-encounter-Bethe |
| title | Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact |
| title_full | Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact |
| title_fullStr | Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact |
| title_full_unstemmed | Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact |
| title_short | Binary-Encounter Model for Direct Ionization of Molecules by Positron-Impact |
| title_sort | binary encounter model for direct ionization of molecules by positron impact |
| topic | positron impact ionization positron-molecule scattering binary-encounter-Bethe |
| url | https://www.mdpi.com/2218-2004/9/4/99 |
| work_keys_str_mv | AT małgorzatafranz binaryencountermodelfordirectionizationofmoleculesbypositronimpact AT katarzynawiciakpawłowska binaryencountermodelfordirectionizationofmoleculesbypositronimpact AT janfranz binaryencountermodelfordirectionizationofmoleculesbypositronimpact |