Plasmon decay mechanisms in proton-solid collisions
A projectile traveling inside a metal can excite bulk plasmons (collective oscillations of the electron gas) that eventually decay. The two main decay mechanisms are the excitation of a nearly free electron (NFe), also referred to as a Bloch electron, and the excitation of a pair of interacting free...
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2005
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n4_p_Bocan http://hdl.handle.net/20.500.12110/paper_10502947_v72_n4_p_Bocan |
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paper:paper_10502947_v72_n4_p_Bocan2023-06-08T16:02:17Z Plasmon decay mechanisms in proton-solid collisions Interacting free electrons Proton-solid collisions Aluminum Carrier concentration Crystal structure Electrons Probability Protons A projectile traveling inside a metal can excite bulk plasmons (collective oscillations of the electron gas) that eventually decay. The two main decay mechanisms are the excitation of a nearly free electron (NFe), also referred to as a Bloch electron, and the excitation of a pair of interacting free electrons (2e). In recent publications we developed a model to study these mechanisms for proton impact on aluminum. In this paper, we apply that model to other simple metals. Interesting results are obtained for magnesium, sodium, and potassium. The comparison of the NFe energy and angular spectra sheds light on the role the crystal structure plays. Results for the total probability and excitation power can also be understood in terms of the elements' different characteristics. Some comments are made regarding the relative importance of the two mechanisms for each element and the role that parameters like the electron density, the crystal structure, and the plasmon linewidth might play in this. Also, an approximate scaling rule is found for the plasmon creation probability as well as for the 2e contribution to the plasmon decay probability. © 2005 The American Physical Society. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n4_p_Bocan http://hdl.handle.net/20.500.12110/paper_10502947_v72_n4_p_Bocan |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Interacting free electrons Proton-solid collisions Aluminum Carrier concentration Crystal structure Electrons Probability Protons |
| spellingShingle |
Interacting free electrons Proton-solid collisions Aluminum Carrier concentration Crystal structure Electrons Probability Protons Plasmon decay mechanisms in proton-solid collisions |
| topic_facet |
Interacting free electrons Proton-solid collisions Aluminum Carrier concentration Crystal structure Electrons Probability Protons |
| description |
A projectile traveling inside a metal can excite bulk plasmons (collective oscillations of the electron gas) that eventually decay. The two main decay mechanisms are the excitation of a nearly free electron (NFe), also referred to as a Bloch electron, and the excitation of a pair of interacting free electrons (2e). In recent publications we developed a model to study these mechanisms for proton impact on aluminum. In this paper, we apply that model to other simple metals. Interesting results are obtained for magnesium, sodium, and potassium. The comparison of the NFe energy and angular spectra sheds light on the role the crystal structure plays. Results for the total probability and excitation power can also be understood in terms of the elements' different characteristics. Some comments are made regarding the relative importance of the two mechanisms for each element and the role that parameters like the electron density, the crystal structure, and the plasmon linewidth might play in this. Also, an approximate scaling rule is found for the plasmon creation probability as well as for the 2e contribution to the plasmon decay probability. © 2005 The American Physical Society. |
| title |
Plasmon decay mechanisms in proton-solid collisions |
| title_short |
Plasmon decay mechanisms in proton-solid collisions |
| title_full |
Plasmon decay mechanisms in proton-solid collisions |
| title_fullStr |
Plasmon decay mechanisms in proton-solid collisions |
| title_full_unstemmed |
Plasmon decay mechanisms in proton-solid collisions |
| title_sort |
plasmon decay mechanisms in proton-solid collisions |
| publishDate |
2005 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n4_p_Bocan http://hdl.handle.net/20.500.12110/paper_10502947_v72_n4_p_Bocan |
| _version_ |
1768541763374415872 |