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

Jakubassa-Amundsen, Doris H.; Haque, Abul Kalam Fazlul; Haque, Md Monirul; Billah, Md Masum; Basak, Arun Kumar; Saha, Bidhan Chandra und Uddin, Md Alfaz (2022): Electron and Positron Scattering from Precious Metal Atoms in the eV to MeV Energy Range. In: Atoms, Bd. 10, Nr. 3, 82

Abstract

This article reports on the scattering of unpolarized and spin polarized electrons and positrons from Ni-28(58),Cu-29(63),Pd-46(108), and Pt-78(196), covering light to heavy precious metal targets. To cover the wide energy domain of 1 eV <= E-i <= 300 MeV, Dirac partial-wave phase-shift analysis is employed, using a complex optical potential for E-i <= 1 MeV and a potential derived from the nuclear charge distribution for E-i > 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Mathematik, Informatik und Statistik > Mathematik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 510 Mathematik
• Sprache: Englisch