Stopping cross section of vanadium for H+ and He+ ions in a large energy interval deduced from backscattering spectra

Author(s)

Moro, M. V. ^[1] ; Bruckner, B. ^{[1, 2]} ; Grande, P. L. ^[3] ; Tabacniks, M. H. ^[4] ; Bauer, P. ^[2] ; Primetzhofer, D. ^[1]

Affiliation

^[1] Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala - Sweden

^[2] Johannes Kepler Univ Linz, Atom Phys & Surface Sci, A-4040 Linz - Austria

^[3] Univ Fed Rio Grande do Sul, Inst Phys, BR-91500970 Porto Alegre, RS - Brazil

^[4] Univ Sao Paulo, Inst Phys, Rua Matao 173, BR-05508100 Sao Paulo - Brazil

• Document type: Journal article
• Source: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIO; v. 424, p. 43-51, JUN 1 2018.
• Web of Science Citations: 4

Abstract

We have experimentally determined electronic stopping cross sections of vanadium for 50-2750 keV protons and for 250-6000 keV He ions by relative measurements in backscattering geometry. To check the consistency of the employed procedure we investigate how to define adequate reference stopping cross section data and chose different reference materials. To proof consistency of different reference data sets, an intercomparison is performed to test the reliability of the evaluation procedure for a wide range of energies. This process yielded consistent results. The resulting stopping cross section data for V are compared to values from the IAEA database, to the most commonly employed semi-empirical program SRIM, and to calculations according to CasP. For helium, our results show a significant deviation of up to 10% with respect to literature and to SRIM, but are in very good agreement with the CasP predictions, in particular when charge-exchange processes are included in the model. (AU)

• FAPESP's process: 13/09105-0 - Study of the stopping power of light ions (H+ and He+) in elements with high atomic mass and in compound samples
• Grantee: Marcos Vinicius Moro
• Support Opportunities: Scholarships in Brazil - Doctorate