Production of excitons in grazing collisions of protons with LiF surfaces: An onion model

被引：4
|
作者：
Miraglia, J. E. [1 ]
Gravielle, M. S.
机构：
[1] Univ Buenos Aires, Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1053 Buenos Aires, DF, Argentina
来源：
PHYSICAL REVIEW A | 2011年 / 84卷 / 06期
关键词：
HYDROGEN-ATOMS; IMPACT; IONIZATION; EXCITATION; ELECTRON;
D O I：
10.1103/PhysRevA.84.062901
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this work we evaluate the production of excitons of a lithium fluoride crystal induced by proton impact in the intermediate and high energy regime (from 100 keV to 1 MeV). A simple model is proposed to account for the influence of the Coulomb grid of the target by dressing crystal ions to transform them in what we call onions. The excited states of these onions can be interpreted as excitons. Within this model, total cross section and stopping power are calculated by using the first Born and the continuum distorted-wave (CDW) eikonal initial-state (EIS) approximations. We found that between 7 and 30 excitons per incident proton are produced in grazing collisions with LiF surfaces, becoming a relevant mechanism of inelastic transitions.
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页数：11
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