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

K. Kawatsura, K. Takahiro, M. Sataka, M. Imai, H. Sugai, K. Ozaki, H. Shibata, K. Komaki

Research output: Contribution to journalArticlepeer-review


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 from N3+ 1s22p(2P)nl Rydberg states produced in N3+ + He collisions, from N2+ 1s22s2p(3P)nl Rydberg states produced in N2+ + He and from N+ 1s22s2p2(4P)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.

Original languageEnglish
Pages (from-to)901-904
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number6
Publication statusPublished - 2009 Mar
Externally publishedYes


  • 32.30.Rj
  • 32.70.-n
  • 34.50.Fa
  • 34.60.+z
  • Autoionization
  • Coster-Kronig transition
  • N ion
  • Zero-degree electron spectroscopy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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