Symmetry- and vibrationally-resolved C K-shell photoionization studies of C2H2

M. Hoshino; K. Nakagawa; C. Makochekanwa; T. Tanaka; N. Kuze; M. Matsumoto; K. Fujiwara; A. De Fanis; Y. Tamenori; M. Kitajima; H. Tanaka; K. Ueda

doi:10.1016/j.cplett.2006.01.070

Symmetry- and vibrationally-resolved C K-shell photoionization studies of C₂H₂

M. Hoshino, K. Nakagawa, C. Makochekanwa, T. Tanaka, N. Kuze, M. Matsumoto, K. Fujiwara, A. De Fanis, Y. Tamenori, M. Kitajima, H. Tanaka, K. Ueda

Division of Measurements

Research output: Contribution to journal › Article

15 Citations (Scopus)

Abstract

The C K-shell photoelectron mainline of C₂H₂ molecules have been measured at photon energies 295-350 eV. The gerade and ungerade symmetries of the core-ionized states, 1σ_g and 1σ_u, are resolved. Resonance enhancement is found only in the 1σ_g photoionization cross-section and assigned to the σu shape resonance. The photoelectron asymmetry parameter takes a minimum value at the shape resonance energy. The shape resonance energy decreases with increase in the vibrational quantum number. No correlational shape resonance appears in the 1σ_u photoionization channel, suggesting that the channel coupling is negligible.

Original language	English
Pages (from-to)	256-260
Number of pages	5
Journal	Chemical Physics Letters
Volume	421
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2006.01.070
Publication status	Published - 2006 Apr 3

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Symmetry- and vibrationally-resolved C K-shell photoionization studies of C2H2",

abstract = "The C K-shell photoelectron mainline of C2H2 molecules have been measured at photon energies 295-350 eV. The gerade and ungerade symmetries of the core-ionized states, 1σg and 1σu, are resolved. Resonance enhancement is found only in the 1σg photoionization cross-section and assigned to the σu shape resonance. The photoelectron asymmetry parameter takes a minimum value at the shape resonance energy. The shape resonance energy decreases with increase in the vibrational quantum number. No correlational shape resonance appears in the 1σu photoionization channel, suggesting that the channel coupling is negligible.",

author = "M. Hoshino and K. Nakagawa and C. Makochekanwa and T. Tanaka and N. Kuze and M. Matsumoto and K. Fujiwara and {De Fanis}, A. and Y. Tamenori and M. Kitajima and H. Tanaka and K. Ueda",

year = "2006",

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doi = "10.1016/j.cplett.2006.01.070",

language = "English",

volume = "421",

pages = "256--260",

journal = "Chemical Physics Letters",

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T1 - Symmetry- and vibrationally-resolved C K-shell photoionization studies of C2H2

AU - Hoshino, M.

AU - Nakagawa, K.

AU - Makochekanwa, C.

AU - Tanaka, T.

AU - Kuze, N.

AU - Matsumoto, M.

AU - Fujiwara, K.

AU - De Fanis, A.

AU - Tamenori, Y.

AU - Kitajima, M.

AU - Tanaka, H.

AU - Ueda, K.

PY - 2006/4/3

Y1 - 2006/4/3

N2 - The C K-shell photoelectron mainline of C2H2 molecules have been measured at photon energies 295-350 eV. The gerade and ungerade symmetries of the core-ionized states, 1σg and 1σu, are resolved. Resonance enhancement is found only in the 1σg photoionization cross-section and assigned to the σu shape resonance. The photoelectron asymmetry parameter takes a minimum value at the shape resonance energy. The shape resonance energy decreases with increase in the vibrational quantum number. No correlational shape resonance appears in the 1σu photoionization channel, suggesting that the channel coupling is negligible.

AB - The C K-shell photoelectron mainline of C2H2 molecules have been measured at photon energies 295-350 eV. The gerade and ungerade symmetries of the core-ionized states, 1σg and 1σu, are resolved. Resonance enhancement is found only in the 1σg photoionization cross-section and assigned to the σu shape resonance. The photoelectron asymmetry parameter takes a minimum value at the shape resonance energy. The shape resonance energy decreases with increase in the vibrational quantum number. No correlational shape resonance appears in the 1σu photoionization channel, suggesting that the channel coupling is negligible.

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