ABSTRACT
The spectrum, which consists of a progression of three bands, shows a widely open rotational structure due to the large geometry change. A wideband pulse amplifier and a gated integrator/boxcar averager were used to collect the signal. A fast UV photodiode, which detected scattered light from the excimer laser, was used to trigger the boxcar averager. Silylene radicals were detected by intracavity laser absorption spectroscopy in a parallel plate radio-frequency -discharge system used in the chemical vapor deposition of hydrogenated amorphous silicon. The Laser Resonance Absorption Flash Kinetic Spectroscopy apparatus and the inherently high resolution of the ring laser used provides Doppler-limited spectra. The transition is detected in direct absorption, so that accurate line intensities can be determined without considering quantum state dependences of fluorescent lifetimes or collisional quenching. In order to show the success of the semirigid-bender treatment of dihydrides, the chapter also shows the calculation of vibronic levels.
