2011
DOI: 10.1103/physreva.84.062901
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Production of excitons in grazing collisions of protons with LiF surfaces: An onion model

Abstract: 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 d… Show more

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Cited by 4 publications
(9 citation statements)
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“…(6) and (11) of Ref. [19] V + G was approximated by a radial onion potential produced by a series of charged shells. But these discrete charged layers introduce structures in the potential, which are difficult to handle.…”
Section: A Ionic Centers Of the Crystal: Onionsmentioning
confidence: 99%
See 3 more Smart Citations
“…(6) and (11) of Ref. [19] V + G was approximated by a radial onion potential produced by a series of charged shells. But these discrete charged layers introduce structures in the potential, which are difficult to handle.…”
Section: A Ionic Centers Of the Crystal: Onionsmentioning
confidence: 99%
“…But these discrete charged layers introduce structures in the potential, which are difficult to handle. Therefore, in this work we fit the previous grid potential [19] by means of a smooth potential, here named Madelung potential, defined as…”
Section: A Ionic Centers Of the Crystal: Onionsmentioning
confidence: 99%
See 2 more Smart Citations
“…Numerical integrations were carried out in these grids with the cubic spline technique. With the stopping power in mind, we have extended the CDW-EIS for excitation as well, which involves the numerical solution of the Schrödinger equation for the initial and final excited state in the same potential V nl (see appendix of [70] for details of the algebra involved). Transitions to 3s, 3p, 3d, 4s, 4p and 4d, including all the magnetic sub-states, were calculated.…”
Section: Numerical Detailsmentioning
confidence: 99%