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Abstract
In this paper we are presenting calculations of the elastic cross section of positrons with gas-phase benzene for the energy range from 0.25 eV to 9.0 eV. The calculations are done with the molecular R-matrix method for positron-scattering from poly-atomic molecules using a scaling factor to scale the electron-positron interaction. The scaling factor influences the position of the poles of the R-matrix. We adjust the scaling factor is such a way, that the position of the lowest pole is similar to the proposed binding energy of around 150 meV, given by [J.A. Young, C.M. Surko, Phys. Rev. Lett 99, 133201 (2007)]. Below the threshold for positronium formation, we calculate elastic cross section in good agreement with experimental cross sections. Above the threshold for positronium formation we use the difference between the experimental total cross section data and our computed elastic cross section to provide a first estimation of the cross section for positronium formation.
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1140/epjd/e2019-100058-5
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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EUROPEAN PHYSICAL JOURNAL D
no. 73,
pages 1 - 6,
ISSN: 1434-6060 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Franz J., Franz M.: Low-energy positron scattering from gas-phase benzene// EUROPEAN PHYSICAL JOURNAL D -Vol. 73,iss. 9 (2019), s.1-6
- DOI:
- Digital Object Identifier (open in new tab) 10.1140/epjd/e2019-100058-5
- Verified by:
- Gdańsk University of Technology
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