First observation of the (B)over-tilde1A1 state of SiH2 and SiD2 radicals by optical-optical double resonance spectroscopy -: art. no. 154302

The (B) over tilde (1A)(1) (state of SiH)(2) (and SiD)(2) (was observed by the optical-optical double resonance technique for the first time. The electronic band origin of the (B) over tilde state of SiD)(2) (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 Dumber was observed in the spectra, representing a quasilinear behavior of the (B) over tilde state. The barrier height to linearity was estimated to be ~ 125 cm-1 by the quasilinear analysis of the bending vibrational level structure of SiD)(2). 2005 American Institute of Physics.