Influence of the description of the target energy-loss function on the energy loss of swift projectiles

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Title: Influence of the description of the target energy-loss function on the energy loss of swift projectiles
Authors: Denton Zanello, Cristian D. | Abril, Isabel | García Molina, Rafael | Moreno Marín, Juan Carlos | 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 | Straggling | Inverse mean free path | Dielectric properties
Knowledge Area: Física Aplicada
Issue Date: 10-Oct-2008
Publisher: John Wiley & Sons
Citation: DENTON, Cristian D., et al. "Influence of the description of the target energy-loss function on the energy loss of swift projectiles". Surface and Interface Analysis. Vol. 40, No. 11 (Nov. 2008). ISSN 0142-2421, pp. 1481-1487
Abstract: The optical energy-loss function (ELF) of Au and Al, obtained from experiments, is extended to finite wavenumber k using three different widely used models, namely, with the Mermin type ELFs with generalized oscillator strengths (MELF-GOS) model, the extended Drude model and the Penn model. The resulting ELFs show important differences but the MELF-GOS model gives more realistic results when compared with the available experimental ELFs for finite k. These differences affect calculations of important parameters in projectile-solid interaction. The calculated stopping power and energy-loss straggling of Au and Al for H projectiles as well as the corresponding inelastic mean free path (IMFP) of electrons in Au and Al clearly show that the results depend on the model used for the ELF description. Comparison with experimental data gives support to the MELF-GOS model, especially in a material with a complex energy-loss spectrum such as Au.
Sponsor: This work was supported by the Spanish Ministerio de Educación y Ciencia (Projects FIS2006-13309-C02-01 and FIS2006-13309-C02-02) and Universitat d’Alacant by Project GRE07-1P. CDD thanks the Spanish Ministerio de Educación y Ciencia and Generalitat Valenciana for support under the Ramón y Cajal Program.
URI: http://hdl.handle.net/10045/25396
ISSN: 0142-2421 (Print) | 1096-9918 (Online)
DOI: 10.1002/sia.2936
Language: eng
Type: info:eu-repo/semantics/article
Rights: The definitive version is available at http://onlinelibrary.wiley.com/
Peer Review: si
Publisher version: http://dx.doi.org/10.1002/sia.2936
Appears in Collections:INV - IPCM - Artículos de Revistas

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