| Título: | Experimental and theoretical studies of the energy-loss straggling of H and He ion beams in HfO2 films |
| Autores: |
Abril Sánchez, Isabel Behar, Moni García Molina, Rafael Fadanelli, Raúl C. Nagamine, Luiz C.C.M. Grande, P.L. Schünemann, L. Denton Zanello, Cristian D. Arista, Néstor R. Saitovitch, E.B. |
| Fecha: |
2012-11-28 2012-11-28 2009-06-06 |
| Publicador: | RUA Docencia |
| Fuente: |
 |
| Tipo: | info:eu-repo/semantics/article |
| Tema: |
Energy loss straggling Stopping power Dielectric properties of solids and liquids HfO2 films Física Aplicada |
| Descripción: |
We report an experimental-theoretical study of the energy-loss straggling of protons and alpha particles in HfO2 films. In the case of H ions the experiments were performed in the energy range 40–1750 keV. For the lower energy interval (40–250 keV) we have used the medium energy ion scattering (MEIS) technique with a resolution of ΔE/E∼ 4×10-3, while for the higher energies the Rutherford backscattering technique (RBS) was employed with an overall resolution of 7 keV. Concerning the He ions the straggling study has covered an energy range between 250 and 3000 keV by using RBS measurements, which in this case had a resolution better than 10 keV. The theoretical calculations were done in the framework of the dielectric formalism using the MELF-GOS model to obtain a proper description of the energy loss function (ELF) of the HfO2 target. It is shown that for both projectiles the experimental data and the theoretical predictions for the energy-loss straggling display a very good agreement. Work financially supported by the Spanish Ministerio de Ciencia e Innovación (Projects Nos. FIS2006-13309-C02-01 and FIS2006-13309-C02-02) and Universitat d’Alacant (Project GRE07-1P). C.D.D. thanks the Spanish Ministerio de Ciencia e Innovación and Generalitat Valenciana for support under the Ramón y Cajal Program. Also this work was supported by the Brazilian CNPq Agency under the contract 150757/2007. |
| Idioma: | Inglés |
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