TY - JOUR
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.
N1 - Funding Information:
The authorws ouldli keto thankD r. H.Yamaoka for settingu p their computesry stemT. his work was partiallys upportedb y a Grant-in-Aidf or Scientific Researcho n Priority Areas of the Ministry of EducationS, ciencea nd Culture of Japan.W e usedM athematicdau ringt hec ourseo f the calculationins the presenstt udy.
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
AN - SCOPUS:0030206935
VL - 363
SP - 127
EP - 132
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1-3
ER -