Resonance signatures in DCS and spin polarization for positron scattering with C60and rare gas endohedrals

Km Akanksha Dubey; Marcelo F Ciappina

doi:10.1088/1361-6455/ac59c9

Resonance signatures in DCS and spin polarization for positron scattering with C₆₀and rare gas endohedrals

Km Akanksha Dubey, Marcelo F Ciappina^*

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We present a comparative study of differential cross sections (DCSs) and spin polarizations for positron scattering from C60 and A@C60, elucidating the role of encapsulation of rare gas atoms inside the giant C60 cage. A comparison is provided with the earlier work for elastic positron-C60 scattering. We find a very good agreement even when a model potential is used for the positron-C60 interaction. Also, we evaluate similarities and differences between the positron and electron DCSs and spin polarizations, both from bare and endohedral targets. To mark resonance features on the scattering dynamics, DCSs and spin polarizations are calculated at resonant energies, which showcase different characteristics compared to the cases where the positron energy is non-resonant. In order to account for a complete picture of the scattering process, an absorption potential is included in the total scattering field. For the sake of illustrating the impact of individual interactions and their interplay as a whole, DCSs and spin polarizations are reported including several scattering interactions alternatively.

Original language	English
Article number	065201
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	55
Issue number	6
DOIs	https://doi.org/10.1088/1361-6455/ac59c9 https://doi.org/10.1088/1361-6455/ac59c9
State	Published - 23 Mar 2022

Keywords

Dirac partial wave analysis
Positron-Cscattering
absorption potential
endohedral spin polarization
rare gas endohedrals
resonance signatures/effects

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title = "Resonance signatures in DCS and spin polarization for positron scattering with C60and rare gas endohedrals",

abstract = "We present a comparative study of differential cross sections (DCSs) and spin polarizations for positron scattering from C60 and A@C60, elucidating the role of encapsulation of rare gas atoms inside the giant C60 cage. A comparison is provided with the earlier work for elastic positron-C60 scattering. We find a very good agreement even when a model potential is used for the positron-C60 interaction. Also, we evaluate similarities and differences between the positron and electron DCSs and spin polarizations, both from bare and endohedral targets. To mark resonance features on the scattering dynamics, DCSs and spin polarizations are calculated at resonant energies, which showcase different characteristics compared to the cases where the positron energy is non-resonant. In order to account for a complete picture of the scattering process, an absorption potential is included in the total scattering field. For the sake of illustrating the impact of individual interactions and their interplay as a whole, DCSs and spin polarizations are reported including several scattering interactions alternatively. ",

keywords = "Dirac partial wave analysis, Positron-Cscattering, absorption potential, endohedral spin polarization, rare gas endohedrals, resonance signatures/effects",

author = "Dubey, {Km Akanksha} and Ciappina, {Marcelo F}",

note = "Publisher Copyright: {\textcopyright} 2022 IOP Publishing Ltd.",

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T1 - Resonance signatures in DCS and spin polarization for positron scattering with C60and rare gas endohedrals

AU - Dubey, Km Akanksha

AU - Ciappina, Marcelo F

PY - 2022/3/23

Y1 - 2022/3/23

N2 - We present a comparative study of differential cross sections (DCSs) and spin polarizations for positron scattering from C60 and A@C60, elucidating the role of encapsulation of rare gas atoms inside the giant C60 cage. A comparison is provided with the earlier work for elastic positron-C60 scattering. We find a very good agreement even when a model potential is used for the positron-C60 interaction. Also, we evaluate similarities and differences between the positron and electron DCSs and spin polarizations, both from bare and endohedral targets. To mark resonance features on the scattering dynamics, DCSs and spin polarizations are calculated at resonant energies, which showcase different characteristics compared to the cases where the positron energy is non-resonant. In order to account for a complete picture of the scattering process, an absorption potential is included in the total scattering field. For the sake of illustrating the impact of individual interactions and their interplay as a whole, DCSs and spin polarizations are reported including several scattering interactions alternatively.

AB - We present a comparative study of differential cross sections (DCSs) and spin polarizations for positron scattering from C60 and A@C60, elucidating the role of encapsulation of rare gas atoms inside the giant C60 cage. A comparison is provided with the earlier work for elastic positron-C60 scattering. We find a very good agreement even when a model potential is used for the positron-C60 interaction. Also, we evaluate similarities and differences between the positron and electron DCSs and spin polarizations, both from bare and endohedral targets. To mark resonance features on the scattering dynamics, DCSs and spin polarizations are calculated at resonant energies, which showcase different characteristics compared to the cases where the positron energy is non-resonant. In order to account for a complete picture of the scattering process, an absorption potential is included in the total scattering field. For the sake of illustrating the impact of individual interactions and their interplay as a whole, DCSs and spin polarizations are reported including several scattering interactions alternatively.

KW - Dirac partial wave analysis

KW - Positron-Cscattering

KW - absorption potential

KW - endohedral spin polarization

KW - rare gas endohedrals

KW - resonance signatures/effects

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U2 - 10.1088/1361-6455/ac59c9

DO - 10.1088/1361-6455/ac59c9

M3 - 文章

SN - 0953-4075

VL - 55

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

IS - 6

M1 - 065201

ER -

Resonance signatures in DCS and spin polarization for positron scattering with C₆₀and rare gas endohedrals

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Keywords

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