Barkas effect in the stopping power for ions with different ionization degrees

The Barkas effect in the electronic stopping power for dressed projectiles moving in a free electron gas is studied for a wide range of velocities v. The interaction of the projectile with the target is described using screened interaction potentials, which take into account the self screening due t...

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Detalles Bibliográficos
Autores principales:	Archubi, C.D., Abril, I., Garcia-Molina, R., Arista, N.R.
Formato:	JOUR
Materias:	Atomic Barkas Collisions Ions Solids Stopping Degrees of ionization Electronic stopping power Interaction potentials Transport cross-section Computer simulation Electron gas Ionization Laser produced plasmas Velocity Projectiles
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_0168583X_v316_n_p88_Archubi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_0168583X_v316_n_p88_Archubi
record_format	dspace
spelling	todo:paper_0168583X_v316_n_p88_Archubi2023-10-03T15:06:30Z Barkas effect in the stopping power for ions with different ionization degrees Archubi, C.D. Abril, I. Garcia-Molina, R. Arista, N.R. Atomic Barkas Collisions Ions Solids Stopping Atomic Barkas Collisions Degrees of ionization Electronic stopping power Interaction potentials Stopping Transport cross-section Computer simulation Electron gas Ionization Ions Laser produced plasmas Solids Velocity Projectiles The Barkas effect in the electronic stopping power for dressed projectiles moving in a free electron gas is studied for a wide range of velocities v. The interaction of the projectile with the target is described using screened interaction potentials, which take into account the self screening due to the projectile bound electrons and the external screening produced by the target electron gas. The Barkas factor is obtained from a classical simulation of the scattering of the target electrons in the potential of the projectile and that of its antiparticle, following the transport cross section model. A large set of numerical simulations were made for different projectiles, degrees of ionization and velocities. We find that the Barkas factor increases at high energies with the number of projectile bound electrons, whereas its velocity dependence changes from the v-3 behavior for bare projectiles to a v-2 behavior for neutral ones. Interesting effects of curve crossings in the Barkas factor at different degrees of ionization as a function of the projectile velocity are observed. A simple scaling law for neutral and fully ionized projectiles is also derived. © 2013 Elsevier B.V. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0168583X_v316_n_p88_Archubi
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Atomic Barkas Collisions Ions Solids Stopping Atomic Barkas Collisions Degrees of ionization Electronic stopping power Interaction potentials Stopping Transport cross-section Computer simulation Electron gas Ionization Ions Laser produced plasmas Solids Velocity Projectiles
spellingShingle	Atomic Barkas Collisions Ions Solids Stopping Atomic Barkas Collisions Degrees of ionization Electronic stopping power Interaction potentials Stopping Transport cross-section Computer simulation Electron gas Ionization Ions Laser produced plasmas Solids Velocity Projectiles Archubi, C.D. Abril, I. Garcia-Molina, R. Arista, N.R. Barkas effect in the stopping power for ions with different ionization degrees
topic_facet	Atomic Barkas Collisions Ions Solids Stopping Atomic Barkas Collisions Degrees of ionization Electronic stopping power Interaction potentials Stopping Transport cross-section Computer simulation Electron gas Ionization Ions Laser produced plasmas Solids Velocity Projectiles
description	The Barkas effect in the electronic stopping power for dressed projectiles moving in a free electron gas is studied for a wide range of velocities v. The interaction of the projectile with the target is described using screened interaction potentials, which take into account the self screening due to the projectile bound electrons and the external screening produced by the target electron gas. The Barkas factor is obtained from a classical simulation of the scattering of the target electrons in the potential of the projectile and that of its antiparticle, following the transport cross section model. A large set of numerical simulations were made for different projectiles, degrees of ionization and velocities. We find that the Barkas factor increases at high energies with the number of projectile bound electrons, whereas its velocity dependence changes from the v-3 behavior for bare projectiles to a v-2 behavior for neutral ones. Interesting effects of curve crossings in the Barkas factor at different degrees of ionization as a function of the projectile velocity are observed. A simple scaling law for neutral and fully ionized projectiles is also derived. © 2013 Elsevier B.V. All rights reserved.
format	JOUR
author	Archubi, C.D. Abril, I. Garcia-Molina, R. Arista, N.R.
author_facet	Archubi, C.D. Abril, I. Garcia-Molina, R. Arista, N.R.
author_sort	Archubi, C.D.
title	Barkas effect in the stopping power for ions with different ionization degrees
title_short	Barkas effect in the stopping power for ions with different ionization degrees
title_full	Barkas effect in the stopping power for ions with different ionization degrees
title_fullStr	Barkas effect in the stopping power for ions with different ionization degrees
title_full_unstemmed	Barkas effect in the stopping power for ions with different ionization degrees
title_sort	barkas effect in the stopping power for ions with different ionization degrees
url	http://hdl.handle.net/20.500.12110/paper_0168583X_v316_n_p88_Archubi
work_keys_str_mv	AT archubicd barkaseffectinthestoppingpowerforionswithdifferentionizationdegrees AT abrili barkaseffectinthestoppingpowerforionswithdifferentionizationdegrees AT garciamolinar barkaseffectinthestoppingpowerforionswithdifferentionizationdegrees AT aristanr barkaseffectinthestoppingpowerforionswithdifferentionizationdegrees
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Barkas effect in the stopping power for ions with different ionization degrees

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