Excitation of 1s4/ levels of He atoms by (10–30 keV) He atoms impact

E. Baszanowska , Ryszard Drozdowski , Patryk Kamiński , G. von Oppen

Abstract

He–He collisions have been investigated in the intermediate-energy range, where the relative velocity of the Helium atoms is on the order of the Bohr velocity. By measuring the fluorescence-light intensity of the spectral line λ(4 3D-2 3P) = 447 nm as a function of an electric field F z applied parallel and antiparallel to the projectile beam, the excitation mechanism has been analyzed. The experimental results are in agreement with the assumption that two electrons are lifted simultaneously on the saddle of the two-center potential of two He+ ions according to the Paul-trap model.
Author E. Baszanowska
E. Baszanowska,,
-
, Ryszard Drozdowski (FMPI / IEP)
Ryszard Drozdowski,,
- Institute of Experimental Physics
, Patryk Kamiński (FMPI / IEP)
Patryk Kamiński,,
- Institute of Experimental Physics
, G. von Oppen
G. von Oppen,,
-
Journal seriesPhysica Scripta, ISSN 0031-8949, (A 25 pkt)
Issue year2019
Vol94
No5
Pages1-9
Publication size in sheets0.5
Keywords in Englishatom–atom collisions, anticrossing spectroscopy, Stark effect, excitation cross-sections, density matrix, ion-atom collisions
ASJC Classification3104 Condensed Matter Physics; 2610 Mathematical Physics; 3107 Atomic and Molecular Physics, and Optics
DOIDOI:10.1088/1402-4896/ab00a3
URL https://doi.org/10.1088/1402-4896/ab00a3
Languageen angielski
Score (nominal)25
ScoreMinisterial score = 25.0, 24-07-2019, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.472; WoS Impact Factor: 2017 = 1.902 (2) - 2017=1.29 (5)
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