title: First observation of the B1A1 state of SiH2 and SiD2 radicals by optical-optical double resonance spectroscopy.
abstract: The B1A1 state of SiH2 and SiD2 was observed by the optical-optical double resonance technique for the first time. The electronic band origin of the B state of SiD2 was determined to be 27 214.11 cm(-1). A very clear exclusive behavior depending on the even/odd value of the bending vibrational quantum number was observed in the spectra, representing a quasilinear behavior of the B state. The barrier height to linearity was estimated to be approximately 125 cm(-1) by the quasilinear analysis of the bending vibrational level structure of SiD2.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Muramoto
authors.forename: Haruki
authors.initials: H
authors.lastname: Ishikawa
authors.forename: Naohiko
authors.initials: N
authors.lastname: Mikami