Positron Scattering from Pyrimidine
The positron impact cross-sections of pyrimidine molecules are reported from 1 eV to 5000 eV. These cross-sections include differential elastic, integral elastic, and direct ionisation. The elastic cross-sections are computed using the single-centre expansion scheme whereas the direct ionisation cro...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Atoms |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-2004/11/3/55 |
| _version_ | 1797613501167960064 |
|---|---|
| author | Abhishek Prashant Meetu Luthra Kanupriya Goswami Anand Bharadvaja Kasturi Lal Baluja |
| author_facet | Abhishek Prashant Meetu Luthra Kanupriya Goswami Anand Bharadvaja Kasturi Lal Baluja |
| author_sort | Abhishek Prashant |
| collection | DOAJ |
| description | The positron impact cross-sections of pyrimidine molecules are reported from 1 eV to 5000 eV. These cross-sections include differential elastic, integral elastic, and direct ionisation. The elastic cross-sections are computed using the single-centre expansion scheme whereas the direct ionisation cross-sections are obtained using the binary-encounter-Bethe formula. The integral and differential cross-sections exhibit consistency with the experimental and other theoretical results. The direct ionisation cross-sections, which are reported for the first time, are compared with the experimental inelastic cross-sections (the sum of excitation and ionisation) to assess the trends in theoretically computed ionisation cross-sections and with the corresponding results for the electrons. The incoherently summed elastic and ionisation cross-sections match very well with the total cross-sections after 40 eV indicating the minimal impact of the positronium formation and electronic excitation processes. Based on this study, we recommend that the experimental data of the inelastic cross-sections reported by Palihawadana et al. be revisited. |
| first_indexed | 2024-03-11T06:56:37Z |
| format | Article |
| id | doaj.art-8e0ef149a4ab4a958f984db610009eda |
| institution | Directory Open Access Journal |
| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-11T06:56:37Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atoms |
| spelling | doaj.art-8e0ef149a4ab4a958f984db610009eda2023-11-17T09:34:19ZengMDPI AGAtoms2218-20042023-03-011135510.3390/atoms11030055Positron Scattering from PyrimidineAbhishek Prashant0Meetu Luthra1Kanupriya Goswami2Anand Bharadvaja3Kasturi Lal Baluja4Department of Physics, Bhaskaracharya College of Applied Sciences, University of Delhi, New Delhi 110075, IndiaDepartment of Physics, Bhaskaracharya College of Applied Sciences, University of Delhi, New Delhi 110075, IndiaDepartment of Physics, Keshav Mahavidyalaya, University of Delhi, Delhi 110034, IndiaDepartment of Physics, Bhaskaracharya College of Applied Sciences, University of Delhi, New Delhi 110075, IndiaFormerly at Department of Physics and Astrophysics, University of Delhi, Delhi 110007, IndiaThe positron impact cross-sections of pyrimidine molecules are reported from 1 eV to 5000 eV. These cross-sections include differential elastic, integral elastic, and direct ionisation. The elastic cross-sections are computed using the single-centre expansion scheme whereas the direct ionisation cross-sections are obtained using the binary-encounter-Bethe formula. The integral and differential cross-sections exhibit consistency with the experimental and other theoretical results. The direct ionisation cross-sections, which are reported for the first time, are compared with the experimental inelastic cross-sections (the sum of excitation and ionisation) to assess the trends in theoretically computed ionisation cross-sections and with the corresponding results for the electrons. The incoherently summed elastic and ionisation cross-sections match very well with the total cross-sections after 40 eV indicating the minimal impact of the positronium formation and electronic excitation processes. Based on this study, we recommend that the experimental data of the inelastic cross-sections reported by Palihawadana et al. be revisited.https://www.mdpi.com/2218-2004/11/3/55positron collisioncross-sectionsBEB modelsingle-centre expansion methodclose-coupling methodspositronium |
| spellingShingle | Abhishek Prashant Meetu Luthra Kanupriya Goswami Anand Bharadvaja Kasturi Lal Baluja Positron Scattering from Pyrimidine Atoms positron collision cross-sections BEB model single-centre expansion method close-coupling methods positronium |
| title | Positron Scattering from Pyrimidine |
| title_full | Positron Scattering from Pyrimidine |
| title_fullStr | Positron Scattering from Pyrimidine |
| title_full_unstemmed | Positron Scattering from Pyrimidine |
| title_short | Positron Scattering from Pyrimidine |
| title_sort | positron scattering from pyrimidine |
| topic | positron collision cross-sections BEB model single-centre expansion method close-coupling methods positronium |
| url | https://www.mdpi.com/2218-2004/11/3/55 |
| work_keys_str_mv | AT abhishekprashant positronscatteringfrompyrimidine AT meetuluthra positronscatteringfrompyrimidine AT kanupriyagoswami positronscatteringfrompyrimidine AT anandbharadvaja positronscatteringfrompyrimidine AT kasturilalbaluja positronscatteringfrompyrimidine |