Valence fluctuation state of a metastable He atom beam on a metal surface, and singlet-triplet conversion

H. Kawai; A. Yoshimori; M. Nakayama

doi:10.1016/0039-6028(96)00120-3

Valence fluctuation state of a metastable He atom beam on a metal surface, and singlet-triplet conversion

H. Kawai, A. Yoshimori, M. Nakayama

Condensed Matter Physics

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

1 Citation (Scopus)

Abstract

The time-dependent expectation value of the triplet metastable He atom is obtained by starting from the singlet state and solving the time-dependent Schrödinger equation directly, to the eighth-order of V, where V is the transfer integral between the conduction electron state and the 2s state of the He atom. The results show that rapid singlet-triplet conversion on the low work-function metal surface occurs through the valence fluctuation state. The quasi-static approximation is demonstrated to be valid to the eighth-order of V. The previously conjectured closed form of the transition rate for the conversion is confirmed.

Original language	English
Pages (from-to)	127-132
Number of pages	6
Journal	Surface Science
Volume	363
Issue number	1-3
DOIs	https://doi.org/10.1016/0039-6028(96)00120-3
Publication status	Published - Aug 1 1996

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Valence fluctuation state of a metastable He atom beam on a metal surface, and singlet-triplet conversion",

abstract = "The time-dependent expectation value of the triplet metastable He atom is obtained by starting from the singlet state and solving the time-dependent Schr{\"o}dinger equation directly, to the eighth-order of V, where V is the transfer integral between the conduction electron state and the 2s state of the He atom. The results show that rapid singlet-triplet conversion on the low work-function metal surface occurs through the valence fluctuation state. The quasi-static approximation is demonstrated to be valid to the eighth-order of V. The previously conjectured closed form of the transition rate for the conversion is confirmed.",

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T1 - Valence fluctuation state of a metastable He atom beam on a metal surface, and singlet-triplet conversion

AU - Kawai, H.

AU - Yoshimori, A.

AU - Nakayama, M.

PY - 1996/8/1

Y1 - 1996/8/1

N2 - The time-dependent expectation value of the triplet metastable He atom is obtained by starting from the singlet state and solving the time-dependent Schrödinger equation directly, to the eighth-order of V, where V is the transfer integral between the conduction electron state and the 2s state of the He atom. The results show that rapid singlet-triplet conversion on the low work-function metal surface occurs through the valence fluctuation state. The quasi-static approximation is demonstrated to be valid to the eighth-order of V. The previously conjectured closed form of the transition rate for the conversion is confirmed.

AB - The time-dependent expectation value of the triplet metastable He atom is obtained by starting from the singlet state and solving the time-dependent Schrödinger equation directly, to the eighth-order of V, where V is the transfer integral between the conduction electron state and the 2s state of the He atom. The results show that rapid singlet-triplet conversion on the low work-function metal surface occurs through the valence fluctuation state. The quasi-static approximation is demonstrated to be valid to the eighth-order of V. The previously conjectured closed form of the transition rate for the conversion is confirmed.

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U2 - 10.1016/0039-6028(96)00120-3

DO - 10.1016/0039-6028(96)00120-3

M3 - Article

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VL - 363

SP - 127

EP - 132

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 1-3

ER -

Valence fluctuation state of a metastable He atom beam on a metal surface, and singlet-triplet conversion

Abstract

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