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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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",

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T1 - Formation of hot hydrogen atoms from superexcited states of acetylene

AU - Kumagai, Yoshiaki

AU - Odagiri, Takeshi

AU - Nakano, Motoyoshi

AU - Suzuki, Isao H.

AU - Hosaka, Kouichi

AU - Kitajima, Masashi

AU - Kouchi, Noriyuki

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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