Abstract
High-resolution Coster-Kronig (C-K) electron emission spectra in collisions of 32 MeV O3+ ions with a He gas target have been investigated using zero-degree electron spectroscopy. Zero-degree electron spectrum for the O 3+ projectiles exhibits a trident-like structure around the cusp peak, consisting of three clear peaks. The sharp peaks directly on either side of the cusp corresponded to autoionization lines from highly excited O 3+ ions produced in the collision with a He gas target, which are confirmed to be due to the configuration 1s22s2p(3P)5s, where the C-K ejection energy is 0.014 eV. The C-K transitions in higher energy region are found to originate in 1s22s2p(3P)nl-1s 22s2εl′ (n = 5-11). For n = 5-7, a clear angular momentum distribution is observed, where the maximum intensity is attributed to the relatively high angular momentum l = 2 or 3.
Original language | English |
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Pages (from-to) | 44-46 |
Number of pages | 3 |
Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
Volume | 245 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2006 Apr |
Event | Proceedings of the Sixth International Symposium on Swift Heavy Ions in Matter (SHIM 2005) - Duration: 2005 May 28 → 2005 May 31 |
Keywords
- Coster-Kronig transition
- O ion
- Rydberg state
- Zero-degree electron spectroscopy
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation