Ejected-electron spectra from Rydberg states in high-energy collisions of O3+ ions with He

K. Kawatsura; K. Takahiro; M. Sataka; M. Imai; K. Komaki; H. Sugai; H. Shibata

doi:10.1016/j.nimb.2005.11.063

Ejected-electron spectra from Rydberg states in high-energy collisions of O³⁺ ions with He

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

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

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
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	https://doi.org/10.1016/j.nimb.2005.11.063
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

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Ejected-electron spectra from Rydberg states in high-energy collisions of O³⁺ ions with He. / Kawatsura, K.; Takahiro, K.; Sataka, M.; Imai, M.; Komaki, K.; Sugai, H.; Shibata, H.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 245, No. 1, 04.2006, p. 44-46.

Research output: Contribution to journal › Conference article › peer-review

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title = "Ejected-electron spectra from Rydberg states in high-energy collisions of O3+ ions with He",

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.",

keywords = "Coster-Kronig transition, O ion, Rydberg state, Zero-degree electron spectroscopy",

author = "K. Kawatsura and K. Takahiro and M. Sataka and M. Imai and K. Komaki and H. Sugai and H. Shibata",

note = "Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; Proceedings of the Sixth International Symposium on Swift Heavy Ions in Matter (SHIM 2005) ; Conference date: 28-05-2005 Through 31-05-2005",

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AU - Kawatsura, K.

AU - Takahiro, K.

AU - Sataka, M.

AU - Imai, M.

AU - Komaki, K.

AU - Sugai, H.

AU - Shibata, H.

PY - 2006/4

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N2 - 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.

AB - 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.

KW - Coster-Kronig transition

KW - O ion

KW - Rydberg state

KW - Zero-degree electron spectroscopy

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