PROTON NON-RUTHERFORD BACKSCATTERING STUDY OF OXIDATION-KINETICS IN CU AND FE SULFIDES

Authors
CHIARI M GIUNTINI L PRATESI G SANTO AP
Citation
M. Chiari et al., PROTON NON-RUTHERFORD BACKSCATTERING STUDY OF OXIDATION-KINETICS IN CU AND FE SULFIDES, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 139(1-4), 1998, pp. 202-207
Citations number
11
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical","Physics, Nuclear
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
139
Issue
1-4
Year of publication
1998
Pages
202 - 207
Database
ISI
SICI code
0168-583X(1998)139:1-4<202:PNBSOO>2.0.ZU;2-X
Abstract
Non-Rutherford backscattering spectrometry (NBS) with 2.4 MeV protons was performed for depth profiling of oxygen in three species of copper and iron sulphides - pyrite, chalcopyrite and bornite - on both alter ed and fresh surfaces. The tarnished surfaces were obtained by bathing samples in H2O2 (35% vol.) for 100 and 1000 s. The spectra collected were compared to simulations to extract quantitative data on oxygen de pth distributions for the different bathing times. The measurements ha ve shown that the kinetics of oxidation has completely different patte rns in the three investigated minerals. (C) 1998 Elsevier Science B.V.