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Dominant two-center electron-electron interactions in collisions of 120-mev ne(sup 6+) ions with gas targets

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Dominant two-center electron-electron interactions in collisions of 120-mev ne(sup 6+) ions with gas targets

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Título Dominant two-center electron-electron interactions in collisions of 120-mev ne(sup 6+) ions with gas targets
Autor Sulik, B.
Ricz, S.
Kadar, I.
Xiao, G.
Schiwietz, Gregor
Sommer, K.
Grande, Pedro Luis
Kohrbruck, R.
Grether, M.
Stolterfoht, N.
Abstract The target gases H2, He, CH4, N2, Ne, andAr were bombarded by 120-MeV Ne6+ ions to study the 2s-nl excitation from the metastable state 1s 22s2p 3P0 of the Ne6+ projectile. The Coster-Kronig electrons from the transition 1s 22pnl (n ~ 7)-ls22s +e- were measured using the method of zero-degree electron spectroscopy. It was found that the production cross section for the Coster-Kronig electrons is roughly proportional to the target atomic number. The experimental data are in agreement with impact-parameter calculations, which take in to account the quenching o f the 3 P 0 metastable state o f the projectile, by exciting or ionizing its 2p electron. This agreement supports the conclusion that the dielectronic two-center process is dominant in the production of Coster-Kronig electrons following the 2s-nl excitation of the projectile by H2 and He targets (>56%), and remains significant for the other investigated targets ( > 22%).
Contido em Physical review. A, Atomic, molecular, and optical physics. New York. Vol. 52, n. 1 (July 1995), p. 387-391
Assunto Espalhamento inelastico profundo
Fisica atomica e molecular
Fisica da materia condensada
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/103626
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