Allotropic effects on the energy loss of swift H+ and He+ ion beams through thin foils

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Title: Allotropic effects on the energy loss of swift H+ and He+ ion beams through thin foils
Authors: García Molina, Rafael | Abril, Isabel | Denton Zanello, Cristian D. | Heredia-Avalos, Santiago
Research Group/s: Interacción de Partículas Cargadas con la Materia
Center, Department or Service: Universidad de Alicante. Departamento de Física Aplicada | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: Stopping power | Energy loss | Energy loss straggling | Dielectric properties | Allotropic effects
Knowledge Area: Física Aplicada
Issue Date: 6-May-2006
Publisher: Elsevier
Citation: GARCIA-MOLINA, Rafael, et al. “Allotropic effects on the energy loss of swift H+ and He+ ion beams through thin foils”. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. Vol. 249, No. 1-2 (Aug. 2006). ISSN 0168-583X, pp. 6-12
Abstract: We have developed a theoretical treatment and a simulation code to study the energy loss of swift H+ and He+ ion beams interacting with thin foils of different carbon allotropes. The former is based on the dielectric formalism, and the latter combines Monte Carlo with the numerical solution of the motion equation for each projectile to describe its trajectory and interactions through the target. The capabilities of both methods are assessed by the reasonably good agreement between their predictions and the experimental results, for a wide range of projectile energies and target characteristics. Firstly, we apply the theoretical procedure to calculate the stopping cross sections for H+ and He+ beams in foils of different allotropic forms of carbon (such as diamond, graphite, amorphous carbon, glassy carbon and C60-fullerite), as a function of the projectile energy. We take into account the electronic structure of the projectile, as well as the different charge states it can acquire, the energy loss associated to the electronic capture and loss processes, the polarization of the projectile, and a realistic description of the target. On the other hand, the simulation code is used to evaluate the energy distributions of swift H+ and He+ ion beams when traversing several foils of the above mentioned allotropic forms of carbon, in order to analyze the influence of the chemical and physical state of the target in the projectile energy loss. These allotropic effects are found to become more important around the maximum of the stopping cross-section.
Sponsor: This work was supported by the Spanish Ministerio de Educación y Ciencia (projects BFM2003-04457-C02-01 and BFM2003-04457-C02-02). S.H.A. thanks Fundación Cajamurcia for a postdoctoral grant. C.D.D. thanks the Spanish Ministerio de Educación y Ciencia for support under the Ramón y Cajal Program.
URI: http://hdl.handle.net/10045/25382
ISSN: 0168-583X (Print) | 1872-9584 (Online)
DOI: 10.1016/j.nimb.2006.03.011
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.nimb.2006.03.011
Appears in Collections:INV - IPCM - Artículos de Revistas

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