Elastic scattering of electrons and positrons from alkali atoms

Saha, Bidhan C.; Jakubaßa-Amundsen, Doris H.; Basak, A. K.; Haque, A. K. F.; Haque, M. M.; Khandker, Mahmudul H.; Uddin, M. Alfaz

doi:10.1016/bs.aiq.2021.08.002

Advances in Quantum Chemistry

2022

DOI: 10.1016/bs.aiq.2021.08.002

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Elastic scattering of electrons and positrons from alkali atoms

Bidhan C. Saha¹,

Doris H. Jakubaßa-Amundsen²,

A. K. Basak³

et al.

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Cited by 2 publications

References 135 publications

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Electron and Positron Scattering from Precious Metal Atoms in the eV to MeV Energy Range

Jakubaßa-Amundsen¹,

Haque

et al. 2022

Atoms

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This article reports on the scattering of unpolarized and spin polarized electrons and positrons from 28Ni58,29Cu63,46Pd108, and 78Pt196, covering light to heavy precious metal targets. To cover the wide energy domain of 1 eV ≤Ei≤300 MeV, Dirac partial-wave phase-shift analysis is employed, using a complex optical potential for Ei≤1 MeV and a potential derived from the nuclear charge distribution for Ei>1 MeV. Results are presented for the differential and integral cross-sections, including elastic, momentum transfer, and viscosity cross-sections. In addition, the inelastic, ionization, and total (elastic + inelastic) cross-section results are provided, together with mean free path estimates. Moreover, the polarization correlations S,T, and U, which are sensitive to phase-dependent interference effects, are considered. Scaling laws with respect to collision energy, scattering angle, and nuclear charge number at ultrahigh energies are derived using the equivalence between elastic scattering and tip bremsstrahlung emission. In addition, a systematic analysis of the critical minima in the differential cross-section and the corresponding total polarization points in the Sherman function S is carried out. A comparison with existing experimental data and other theoretical findings is made in order to test the merit of the present approach in explaining details of the measurements.

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Electron and Positron Scattering from Precious Metal Atoms in the eV to MeV Energy Range

Jakubaßa-Amundsen¹,

Haque

et al. 2022

Atoms

View full text Add to dashboard Cite

show abstract

A Theoretical Study of Scattering of e± by Tl Atom

Parvin

Billah

Khandker

et al. 2023

Atoms

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This article incorporates details of our calculations of the observable quantities for the scattering of electrons and positrons from a post transition metal Thallium (Tl), in the energy range of 1 eV ≤ Ei ≤ 1 MeV, using the relativistic Dirac partial wave (phase-shift) analysis employing a complex optical-potential. Absolute differential, integrated elastic and inelastic, transport, total ionization, and total cross sections and a thorough study of the critical minima in the elastic differential cross sections along with the associated angular positions of the maximum polarization points in the Sherman function are provided to study the collision dynamics. The optical potential model incorporates the interactions of the incident electron and/or positron with both the nucleus and the bound electrons of the target atom. In-depth analyses of the spin asymmetry, which are sensitive to phases related interference effect, brought on by the various ingredients of the lepton-atom interaction, are also presented. The performance of the current approach to explain the observations, with the exception of the extremely low energy domain, is shown by a comparison of the previous experimental and theoretical results on this target atom.

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Elastic scattering of electrons and positrons from alkali atoms

Cited by 2 publications

References 135 publications

Electron and Positron Scattering from Precious Metal Atoms in the eV to MeV Energy Range

Electron and Positron Scattering from Precious Metal Atoms in the eV to MeV Energy Range

A Theoretical Study of Scattering of e± by Tl Atom

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