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

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

1 Department of Chemistry and Materials Technology, Kyoto Institute of Technology
2 Theoretical Radiation Research Laboratory
3 Advanced Science Research Center and Nuclear Science Research Institute, Japan Atomic Energy Agency
4 Kyoto University, Department of Nuclear Engineering
5 National Center for University Entrance Examinations

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 C-K electron transitions for Nq+ (q = 1-3) projectiles are also discussed, where the highly excited states are formed by electron excitation.

Mots clés: Autoionization; Coster-Kronig transitions; N ion; Zero-degree electron spectroscopy

Domaines: Physique Atomique [physics.atom-ph]

K. Kawatsura, K. Takahiro, M. Sataka, M. Imai, H. Sugai, et al.. Autoionization of N(q+) (q=1-3) Rydberg states produced in high energy collisions with He. The Seventh International Symposium on Swift Heavy Ions in Matter, Jun 2008, Lyon, France. ⟨hal-00256225⟩