Ionization studies of channelled hydrogen-like F ions in a Si single crystal

Autor:	Igor Bray, M.B. Kurup, K. G. Prasad, P. N. Tandon, Amal Saha
Rok vydání:	1999
Předmět:	Physics Chemical ionization Ionization Physics::Atomic and Molecular Clusters Thermal ionization Electron Atomic physics Molar ionization energies of the elements Condensed Matter Physics Single crystal Atomic and Molecular Physics and Optics Electron ionization Ion
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 32:1429-1438
ISSN:	1361-6455 0953-4075
Popis:	Channelled ions in a Si single crystal see a very high density quasi-free electron gas and hence provide an opportunity to study e-impact ionization of the projectile even though the e-e interaction responsible for this is much weaker than the e-n interaction which usually dominates the process of projectile ionization. The e-e interaction has been experimentally identified through the observed fast increase in the impact energy dependence of the ionization of the hydrogen-like F ions, the calculated contribution from the e-n interaction being impact energy independent at large impact parameters. The relative variation of the measured cross sections for well-channelled ions is in good agreement with the convergent close-coupling theory of e-impact ionization and existing scaling laws. In addition to the M-shell electrons, participation of the Si L-shell in the ionization of the channelled ion is suggested.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c0cc8fb13a86dd0e760527e89b17e538 https://doi.org/10.1088/0953-4075/32/6/007 Zobrazit plný text záznamu