Autoionization of Nq+ (q=1-3) Rydberg states produced in high-energy collisions with He

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:267

Article; Proceedings Paper

Kawatsura, K.¹  Takahiro, K.¹  Sataka, M.^2,3  Imai, M.⁴  Sugai, H.^2,3  Ozaki, K.¹  Shibata, H.⁴  Komaki, K.⁵ 

[1] Kyoto Inst Technol, Dept Chem & Mat Technol, Sakyo Ku, Kyoto 6068585, Japan

[2] Japan Atom Energy Agcy, Adv Sci Res Ctr, Ibaraki 3191195, Japan

[3] Japan Atom Energy Agcy, Nucl Sci Res Inst, Ibaraki 3191195, Japan

[4] Kyoto Univ, Dept Nucl Engn, Sakyo Ku, Kyoto 6068501, Japan

[5] Natl Ctr Univ Entrance Examinat, Meguro Ku, Tokyo 1538501, Japan

关键词: Autoionization;    Coster-Kronig transition;    N ion;    Zero-degree electron spectroscopy;   

DOI  :  10.1016/j.nimb.2009.02.003

来源: Elsevier

【 摘 要 】

Energy spectra of electrons ejected through autoionization decay of high-Rydberg states in high-energy collisions of Nq+ (q = 1-3) with He have been measured with high-resolution by using zero-degree electron spectroscopy. Several series of autoionizing lines were observed, corresponding to decays front N3+ 1s(2)2p(P-2)nl Rydberg states produced in N3+ + He collisions, from N2+ 1 s(2)2s2p(P-3)nl Rydberg states produced in N2+ + He and from N+ 1s(2)2s2p(2)(P-4)nl Rydberg states produced in N+ + He, respectively. Angular momentum distributions for the first or second peak of three series of Coster-Kronig electron transitions for Nq+ (q = 1-3) projectiles are also discussed, where the highly excited states are formed by electron excitation. (C) 2009 Elsevier B.V. All rights reserved.

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