Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study
The vibrational excitation cross-section of a diatomic molecule by positron impact is obtained using wave-packet propagation techniques. The dynamics study was carried on a two-dimensional potential energy surface, which couples a hydrogenlike harmonic oscillator to a positron via a spherically symm...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-09-01
|
| Series: | Atoms |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-2004/9/3/64 |
| _version_ | 1797520272382754816 |
|---|---|
| author | Luis A. Poveda Marcio T. do N. Varella José R. Mohallem |
| author_facet | Luis A. Poveda Marcio T. do N. Varella José R. Mohallem |
| author_sort | Luis A. Poveda |
| collection | DOAJ |
| description | The vibrational excitation cross-section of a diatomic molecule by positron impact is obtained using wave-packet propagation techniques. The dynamics study was carried on a two-dimensional potential energy surface, which couples a hydrogenlike harmonic oscillator to a positron via a spherically symmetric correlation polarization potential. The cross-section for the excitation of the first vibrational mode is in good agreement with previous reports. Our model suggests that a positron couples to the target vibration by responding instantly to an interaction potential, which depends on the target vibrational coordinate. |
| first_indexed | 2024-03-10T07:54:26Z |
| format | Article |
| id | doaj.art-af354faff17d4d7aac380218829d1d07 |
| institution | Directory Open Access Journal |
| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-10T07:54:26Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atoms |
| spelling | doaj.art-af354faff17d4d7aac380218829d1d072023-11-22T12:01:36ZengMDPI AGAtoms2218-20042021-09-01936410.3390/atoms9030064Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics StudyLuis A. Poveda0Marcio T. do N. Varella1José R. Mohallem2Departamento de Física, Centro Federal de Educação Tecnológica de Minas Gerais, Belo Horizonte 30421-169, MG, BrazilIntituto de Fısica, Universidade de São Paulo, São Paulo 05315-970, SP, BrazilDepartamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte 30123-970, MG, BrazilThe vibrational excitation cross-section of a diatomic molecule by positron impact is obtained using wave-packet propagation techniques. The dynamics study was carried on a two-dimensional potential energy surface, which couples a hydrogenlike harmonic oscillator to a positron via a spherically symmetric correlation polarization potential. The cross-section for the excitation of the first vibrational mode is in good agreement with previous reports. Our model suggests that a positron couples to the target vibration by responding instantly to an interaction potential, which depends on the target vibrational coordinate.https://www.mdpi.com/2218-2004/9/3/64positronmodel potentialwave-packet propagationvibrational cross-section |
| spellingShingle | Luis A. Poveda Marcio T. do N. Varella José R. Mohallem Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study Atoms positron model potential wave-packet propagation vibrational cross-section |
| title | Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study |
| title_full | Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study |
| title_fullStr | Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study |
| title_full_unstemmed | Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study |
| title_short | Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study |
| title_sort | vibrational excitation cross section by positron impact a wave packet dynamics study |
| topic | positron model potential wave-packet propagation vibrational cross-section |
| url | https://www.mdpi.com/2218-2004/9/3/64 |
| work_keys_str_mv | AT luisapoveda vibrationalexcitationcrosssectionbypositronimpactawavepacketdynamicsstudy AT marciotdonvarella vibrationalexcitationcrosssectionbypositronimpactawavepacketdynamicsstudy AT josermohallem vibrationalexcitationcrosssectionbypositronimpactawavepacketdynamicsstudy |