Formation of hot hydrogen atoms from superexcited states of acetylene

Yoshiaki Kumagai; Takeshi Odagiri; Motoyoshi Nakano; Isao H. Suzuki; Kouichi Hosaka; Masashi Kitajima; Noriyuki Kouchi

doi:10.1063/1.5058101

Formation of hot hydrogen atoms from superexcited states of acetylene

Yoshiaki Kumagai, Takeshi Odagiri, Motoyoshi Nakano, Isao H. Suzuki, Kouichi Hosaka, Masashi Kitajima, Noriyuki Kouchi

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The cross sections for the formation of the H(2p) and H(2s) atoms, σ _2p and σ _2s , respectively, in photoexcitation of C ₂ H ₂ were obtained in an absolute scale for studying formation and decay of superexcited states in the extreme ultraviolet range. Several superexcited states of C ₂ H ₂ including multiply excited states were found in the curve of the σ _2p cross sections as a function of the incident photon energy. The same states seem to contribute to the variation in the σ _2s cross sections as well, which can be ascribed to the non-adiabatic transitions between the 2p and 2s channels. The Σ/Π symmetry-resolved cross sections for the H(2s) atom formation, σ2sΣ and σ2sΠ, were also obtained on an absolute scale. The coupling between the Σu+1 and ¹ Π _u states was found to be small.

Original language	English
Article number	244302
Journal	Journal of Chemical Physics
Volume	149
Issue number	24
DOIs	https://doi.org/10.1063/1.5058101
Publication status	Published - 2018 Dec 28
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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@article{59b140c2d93e4e8ba3e85436d44d9131,

title = "Formation of hot hydrogen atoms from superexcited states of acetylene",

abstract = " The cross sections for the formation of the H(2p) and H(2s) atoms, σ 2p and σ 2s , respectively, in photoexcitation of C 2 H 2 were obtained in an absolute scale for studying formation and decay of superexcited states in the extreme ultraviolet range. Several superexcited states of C 2 H 2 including multiply excited states were found in the curve of the σ 2p cross sections as a function of the incident photon energy. The same states seem to contribute to the variation in the σ 2s cross sections as well, which can be ascribed to the non-adiabatic transitions between the 2p and 2s channels. The Σ/Π symmetry-resolved cross sections for the H(2s) atom formation, σ2sΣ and σ2sΠ, were also obtained on an absolute scale. The coupling between the Σu+1 and 1 Π u states was found to be small. ",

author = "Yoshiaki Kumagai and Takeshi Odagiri and Motoyoshi Nakano and Suzuki, {Isao H.} and Kouichi Hosaka and Masashi Kitajima and Noriyuki Kouchi",

note = "Funding Information: The experiment was carried out under the approval of the Photon Factory Program Advisory Committee for Proposal Nos. 2010G084 and 2014G119. Y.K. acknowledges support from JSPS KAKENHI Grant No. JP12J08823. Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

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doi = "10.1063/1.5058101",

language = "English",

volume = "149",

journal = "Journal of Chemical Physics",

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AU - Kumagai, Yoshiaki

AU - Odagiri, Takeshi

AU - Nakano, Motoyoshi

AU - Suzuki, Isao H.

AU - Hosaka, Kouichi

AU - Kitajima, Masashi

AU - Kouchi, Noriyuki

N1 - Funding Information: The experiment was carried out under the approval of the Photon Factory Program Advisory Committee for Proposal Nos. 2010G084 and 2014G119. Y.K. acknowledges support from JSPS KAKENHI Grant No. JP12J08823. Publisher Copyright: © 2018 Author(s).

PY - 2018/12/28

Y1 - 2018/12/28

N2 - The cross sections for the formation of the H(2p) and H(2s) atoms, σ 2p and σ 2s , respectively, in photoexcitation of C 2 H 2 were obtained in an absolute scale for studying formation and decay of superexcited states in the extreme ultraviolet range. Several superexcited states of C 2 H 2 including multiply excited states were found in the curve of the σ 2p cross sections as a function of the incident photon energy. The same states seem to contribute to the variation in the σ 2s cross sections as well, which can be ascribed to the non-adiabatic transitions between the 2p and 2s channels. The Σ/Π symmetry-resolved cross sections for the H(2s) atom formation, σ2sΣ and σ2sΠ, were also obtained on an absolute scale. The coupling between the Σu+1 and 1 Π u states was found to be small.

AB - The cross sections for the formation of the H(2p) and H(2s) atoms, σ 2p and σ 2s , respectively, in photoexcitation of C 2 H 2 were obtained in an absolute scale for studying formation and decay of superexcited states in the extreme ultraviolet range. Several superexcited states of C 2 H 2 including multiply excited states were found in the curve of the σ 2p cross sections as a function of the incident photon energy. The same states seem to contribute to the variation in the σ 2s cross sections as well, which can be ascribed to the non-adiabatic transitions between the 2p and 2s channels. The Σ/Π symmetry-resolved cross sections for the H(2s) atom formation, σ2sΣ and σ2sΠ, were also obtained on an absolute scale. The coupling between the Σu+1 and 1 Π u states was found to be small.

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JF - Journal of Chemical Physics

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Formation of hot hydrogen atoms from superexcited states of acetylene

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