Abstract:
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 $\tilde{P}s$. We illustrate the general trend by concrete examples of positron and electron scattering upon endohedrals He@C$_{60}$ and Ar@C$_{60}$, and compare it to scattering upon fullerene C$_{60}$. To obtain the presented results, we have employed new simplified approaches that permit to incorporate the effect of fullerenes polarizability into the He@C$_{60}$ and Ar@C$_{60}$ 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 $\tilde{P}s$ formation.
Citation:
M. Ya. Amusia, L. V. Chernysheva, “Low-energy positron scattering upon endohedrals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 106:1 (2017), 3–8; JETP Letters, 106:1 (2017), 1–6
This publication is cited in the following 5 articles:
Miron Y. Amusia, Springer Handbooks, Springer Handbook of Atomic, Molecular, and Optical Physics, 2023, 363
Km Akanksha Dubey, Marcelo F. Ciappina, Eur. Phys. J. D, 76:4 (2022)
S. Civis, A. V. Krisilov, M. Ferus, I. V. Nechaev, P. Kubelik, V. E. Chernov, B. A. Zon, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr., 254 (2021), 119593
Miron Ya. Amusia, Larissa V. Chernysheva, Springer Series on Atomic, Optical, and Plasma Physics, 117, Computation of Atomic and Molecular Processes, 2021, 407
Miron Ya. Amusia, FIAS Interdisciplinary Science Series, Discoveries at the Frontiers of Science, 2020, 225