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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.09832 |
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| _version_ | 1866916947255361536 |
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| author | Lüdde, Hans Jürgen Horbatsch, Marko Kirchner, Tom |
| author_facet | Lüdde, Hans Jürgen Horbatsch, Marko Kirchner, Tom |
| contents | The previously applied independent atom model (IAM) for highly charged ion-molecule collisions which implemented the suppression of multiple ionization and capture on the basis of geometric overlaps of cross-sectional areas representing ion-atom cross sections using a pixel counting method (PCM), [Phys. Rev. A {\bf 101}, 062709 (2020)] is extended to incorporate the possibility of multiple collisions within the molecule. This is accomplished on the basis of estimated mean free paths for sequential projectile-atom collisions. The IAM-PCM was demonstrated to be successful in describing proton-molecule collisions, and moderately-charged ion impact at high collision energies. The new model does agree with these results, but has important consequences for highly charged projectiles providing larger cross sections than IAM-PCM, but still well below the simple additivity rule results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_09832 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A generalized independent atom model approach for net ionization of molecules by multiply-charged heavy-ion impact Lüdde, Hans Jürgen Horbatsch, Marko Kirchner, Tom Atomic Physics Quantum Physics The previously applied independent atom model (IAM) for highly charged ion-molecule collisions which implemented the suppression of multiple ionization and capture on the basis of geometric overlaps of cross-sectional areas representing ion-atom cross sections using a pixel counting method (PCM), [Phys. Rev. A {\bf 101}, 062709 (2020)] is extended to incorporate the possibility of multiple collisions within the molecule. This is accomplished on the basis of estimated mean free paths for sequential projectile-atom collisions. The IAM-PCM was demonstrated to be successful in describing proton-molecule collisions, and moderately-charged ion impact at high collision energies. The new model does agree with these results, but has important consequences for highly charged projectiles providing larger cross sections than IAM-PCM, but still well below the simple additivity rule results. |
| title | A generalized independent atom model approach for net ionization of molecules by multiply-charged heavy-ion impact |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2509.09832 |