Low-energy positron scattering upon endohedrals
- Авторы: Amusia M.Y.1,2, Chernysheva L.V.2
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Учреждения:
- The Racah Institute of Physics
- Ioffe Institute
- Выпуск: Том 106, № 1 (2017)
- Страницы: 1-6
- Раздел: Fields, Particles, and Nuclei
- URL: https://journals.rcsi.science/0021-3640/article/view/160268
- DOI: https://doi.org/10.1134/S002136401713001X
- ID: 160268
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Аннотация
We investigate positron scattering upon endohedrals and compare it with electron-endohedral scattering. We show that the polarization of the fullerene shell considerably alters the polarization potential of an atom, stuffed inside a fullerene. This essentially affects both the positron and electron elastic scattering phases as well as corresponding cross sections. Of great importance is also the interaction between the incoming positron and the target electrons that leads to formation of the virtual positronium P̃s. We illustrate the general trend by concrete examples of positron and electron scattering upon endohedrals He@C60 and Ar@C60, and compare it to scattering upon fullerene C60. To obtain the presented results, we have employed new simplified approaches that permit to incorporate the effect of fullerenes polarizability into the He@C60 and Ar@C60 polarization potential and to take into account the virtual positronium formation. Using these approaches, we obtained numeric results that show strong variations in shape and magnitudes of scattering phases and cross sections due to effect of endohedral polarization and P̃s formation.
Об авторах
M. Amusia
The Racah Institute of Physics; Ioffe Institute
Автор, ответственный за переписку.
Email: amusia@vms.huji.ac.il
Израиль, Jerusalem, 91904; St. Petersburg, 194021
L. Chernysheva
Ioffe Institute
Email: amusia@vms.huji.ac.il
Россия, St. Petersburg, 194021
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