Allotropic effects on the energy loss of swift H+ and He+ ion beams through thin foils
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http://hdl.handle.net/10045/25382
Títol: | Allotropic effects on the energy loss of swift H+ and He+ ion beams through thin foils |
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Autors: | García Molina, Rafael | Abril, Isabel | Denton Zanello, Cristian D. | Heredia-Avalos, Santiago |
Grups d'investigació o GITE: | Interacción de Partículas Cargadas con la Materia |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Física Aplicada | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal |
Paraules clau: | Stopping power | Energy loss | Energy loss straggling | Dielectric properties | Allotropic effects |
Àrees de coneixement: | Física Aplicada |
Data de publicació: | 6-de maig-2006 |
Editor: | Elsevier |
Citació bibliogràfica: | 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 |
Resum: | 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. |
Patrocinadors: | 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 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1016/j.nimb.2006.03.011 |
Apareix a la col·lecció: | INV - IPCM - Artículos de Revistas |
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Arxiu | Descripció | Tamany | Format | |
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2006GarciaMolina.etal-NIMB249(2006)6_alotropos.pdf | Versión final (acceso restringido) | 496,75 kB | Adobe PDF | Obrir Sol·licitar una còpia |
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