caa a22 4500 445868368 CHVBK 20180317145504.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1140/epjd/e2010-10153-8 doi (NATIONALLICENCE)springer-10.1140/epjd/e2010-10153-8 Optical emissions of products sputtered from Fe, Fe2O3 and Fe3O4 powders [Elektronische Daten] [K. Hammoum, T. El Asri, A. Chahboune, H. Aouchiche, A. Kaddouri] Abstract.: Powder iron has been bombarded by a 5keV Kr+ ions in a vacuum better than 10-7torr and under few 10-6torr ultra pure oxygen partial pressure. The optical spectra of the sputtered particles were recorded between 340.0nm and 410.0nm. These spectra exhibit discrete lines, which are attributed to neutral excited atoms of iron. Two iron oxides, namely hematite (Fe2O$_{3})$ and magnetite (Fe3O$_{4})$, in powder form, were studied under the same experimental conditions and identical lines were observed in the obtained spectra. The absolute intensities of the spectral lines in all spectra were measured and the differences in the recorded yield photons were discussed in term of electron-transfer processes between the excited sputtered atom and the bombarded surface. In accordance with the proposed interpretation, we suggest values for the energy gaps and electronic affinities for the studied oxides and for the oxide layer that might be formed by the adsorption of oxygen atoms. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2010 Hammoum K. Laboratoire de Mécanique, Structure et Énergétique, Université Mouloud Mammeri de Tizi-Ouzou, 15000, Tizi-Ouzou, Algeria aut El Asri T. Equipe SIAM, Faculté des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco aut Chahboune A. Equipe SIAM, Faculté des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco aut Aouchiche H. Laboratoire de Mécanique, Structure et Énergétique, Université Mouloud Mammeri de Tizi-Ouzou, 15000, Tizi-Ouzou, Algeria aut Kaddouri A. Equipe SIAM, Faculté des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco aut The European Physical Journal D Springer-Verlag 61/2(2011-01-01), 469-474 1434-6060 61:2<469 2011 61 10053 https://doi.org/10.1140/epjd/e2010-10153-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2010-10153-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hammoum K. Laboratoire de Mécanique, Structure et Énergétique, Université Mouloud Mammeri de Tizi-Ouzou, 15000, Tizi-Ouzou, Algeria aut NATIONALLICENCE 700 1- El Asri T. Equipe SIAM, Faculté des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco aut NATIONALLICENCE 700 1- Chahboune A. Equipe SIAM, Faculté des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco aut NATIONALLICENCE 700 1- Aouchiche H. Laboratoire de Mécanique, Structure et Énergétique, Université Mouloud Mammeri de Tizi-Ouzou, 15000, Tizi-Ouzou, Algeria aut NATIONALLICENCE 700 1- Kaddouri A. Equipe SIAM, Faculté des Sciences Semlalia, Université Cadi Ayyad, Marrakech, Morocco aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 61/2(2011-01-01), 469-474 1434-6060 61:2<469 2011 61 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer