2024-03-29T01:40:47Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2186052020-08-26T01:11:28Zcom_10261_115com_10261_3col_10261_368
00925njm 22002777a 4500
dc
Nagy, Istvan
author
Aldazabal, Íñigo
author
2020
Motivated by the recently introduced [Phys. Rev. A 94, 042704 (2016)] and already investigated [J. Phys. B: At. Mol. Opt. Phys. 50, 185201 (2017)] new approximate form for the stopping power in terms of scattering phase shifts, here we show analytically that within such a modeling of the observable an exact leading phase shift may contain that information which is completely enough to characterize the asymptotic charge-sign-independent Bethe term (∝Z21) and a charge-sign-dependent (Barkas) term (∝Z31) in the stopping force of a degenerate electron gas for fast projectiles with charge . Our study is based on a spherical potential with velocity-dependent screening as in the above works. The next term in an asymptotic expansion, the Bloch term (∝Z41), measures the difference of the exact and first-order Born treatments with Coulomb potential.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 474: 74-77 (2020)
0168-583X
http://hdl.handle.net/10261/218605
10.1016/j.nimb.2020.04.013
http://dx.doi.org/10.13039/501100003329
Stopping power
Charge-sign effect
Regularization
Swift charged particles in a degenerate electron gas: An estimation for the charge-sign effect in stopping