Low- and intermediate-energy stopping power of protons and antiprotons in solid targets
In this paper we propose a nonperturbative approximation to electronic stopping power based on the central screened potential of a projectile moving in a free-electron gas, by Nagy and Apagyi [Phys. Rev. A 58, R1653 (1998)PLRAAN1050-294710.1103/PhysRevA.58.R1653]. We used this model to evaluate the...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v96_n1_p_Montanari http://hdl.handle.net/20.500.12110/paper_24699926_v96_n1_p_Montanari |
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paper:paper_24699926_v96_n1_p_Montanari2023-06-08T16:36:05Z Low- and intermediate-energy stopping power of protons and antiprotons in solid targets Electron gas Energy dissipation Germanium Lead Projectiles Antiproton impact Dielectric formalism Electronic stopping power Free electron gas High energy regions Intermediate energies Plasmon excitations Protons and antiprotons Electrons In this paper we propose a nonperturbative approximation to electronic stopping power based on the central screened potential of a projectile moving in a free-electron gas, by Nagy and Apagyi [Phys. Rev. A 58, R1653 (1998)PLRAAN1050-294710.1103/PhysRevA.58.R1653]. We used this model to evaluate the energy loss of protons and antiprotons in ten solid targets: Cr, C, Ni, Be, Ti, Si, Al, Ge, Pb, Li, and Rb. They were chosen as canonicals because they have reliable Wigner-Seitz radius, rs=1.48 to 5.31, which cover most of the possible metallic solids. Present low-velocity results agree well with the experimental data for both proton and antiproton impact. Our formalism describes the binary collision of the projectile and one electron of the free-electron gas. It does not include the collective or plasmon excitations, which are important in the intermediate- and high-velocity regime. The distinguishing feature of this contribution is that by using the present model for low to intermediate energies and the Lindhard dielectric formalism for intermediate to high energies, we describe the stopping due to free-electron gas in an extensive energy range. Moreover, by adding the inner-shell contribution using the shellwise local plasma approximation, we are able to describe all the available experimental data in the low-, intermediate-, and high-energy regions. © 2017 American Physical Society. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v96_n1_p_Montanari http://hdl.handle.net/20.500.12110/paper_24699926_v96_n1_p_Montanari |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Electron gas Energy dissipation Germanium Lead Projectiles Antiproton impact Dielectric formalism Electronic stopping power Free electron gas High energy regions Intermediate energies Plasmon excitations Protons and antiprotons Electrons |
| spellingShingle |
Electron gas Energy dissipation Germanium Lead Projectiles Antiproton impact Dielectric formalism Electronic stopping power Free electron gas High energy regions Intermediate energies Plasmon excitations Protons and antiprotons Electrons Low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| topic_facet |
Electron gas Energy dissipation Germanium Lead Projectiles Antiproton impact Dielectric formalism Electronic stopping power Free electron gas High energy regions Intermediate energies Plasmon excitations Protons and antiprotons Electrons |
| description |
In this paper we propose a nonperturbative approximation to electronic stopping power based on the central screened potential of a projectile moving in a free-electron gas, by Nagy and Apagyi [Phys. Rev. A 58, R1653 (1998)PLRAAN1050-294710.1103/PhysRevA.58.R1653]. We used this model to evaluate the energy loss of protons and antiprotons in ten solid targets: Cr, C, Ni, Be, Ti, Si, Al, Ge, Pb, Li, and Rb. They were chosen as canonicals because they have reliable Wigner-Seitz radius, rs=1.48 to 5.31, which cover most of the possible metallic solids. Present low-velocity results agree well with the experimental data for both proton and antiproton impact. Our formalism describes the binary collision of the projectile and one electron of the free-electron gas. It does not include the collective or plasmon excitations, which are important in the intermediate- and high-velocity regime. The distinguishing feature of this contribution is that by using the present model for low to intermediate energies and the Lindhard dielectric formalism for intermediate to high energies, we describe the stopping due to free-electron gas in an extensive energy range. Moreover, by adding the inner-shell contribution using the shellwise local plasma approximation, we are able to describe all the available experimental data in the low-, intermediate-, and high-energy regions. © 2017 American Physical Society. |
| title |
Low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| title_short |
Low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| title_full |
Low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| title_fullStr |
Low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| title_full_unstemmed |
Low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| title_sort |
low- and intermediate-energy stopping power of protons and antiprotons in solid targets |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v96_n1_p_Montanari http://hdl.handle.net/20.500.12110/paper_24699926_v96_n1_p_Montanari |
| _version_ |
1768542480357130240 |