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Title: | Inelastic collisions of fast charged particles with atoms: Bethe asymptotic formulas and shell corrections |
Author: | Salvat Gavaldà, Francesc Barjuan Ballabriga, Laia Andreo Lillo, Patricia |
Keywords: | Col·lisions (Física nuclear) Espai exterior Collisions (Nuclear physics) Outer space |
Issue Date: | 20-Apr-2022 |
Publisher: | American Physical Society |
Abstract: | The relativistic plane-wave Born approximation is applied to the study of inelastic collisions of charged particles with atoms, by considering atomic wave functions calculated from the independent-electron approximation with the self-consistent Dirac-Hartree-Fock-Slater potential. A database of longitudinal and transverse generalized oscillator strengths (GOSs) has been computed by using accurate numerical methods for all the subshells of the ground-state configurations of the elements with atomic numbers from 1 (hydrogen) to 99 (einsteinium). The calculated GOS do not satisfy the Bethe sum rule; departures from the sum rule are in accordance with previous theoretical estimates. Asymptotic high-energy formulas for the total cross section, the stopping cross section, and the energy-straggling cross section are derived with proper account of the relativistic departure from the Bethe sum rule. The shell correction is calculated as the energy-dependent term that, when added to the asymptotic formula, reproduces the value of the atomic cross section calculated by integrating the energy-loss differential cross section. Shell corrections to the stopping cross section obtained from the present approach are presented and compared with previous estimates. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevA.105.042813 |
It is part of: | Physical Review A, 2022, vol. 105 |
URI: | http://hdl.handle.net/2445/213506 |
Related resource: | https://doi.org/10.1103/PhysRevA.105.042813 |
ISSN: | 2469-9926 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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