Spectroscopic Study of the A~1A ' - X~1A' System of CHBr

摘要

We report fluorescence excitation and emission spectra of the CHBr molecule generated via pyrolysis of CH3Br in a molecular beam experiment. The 193 nm attenuation cross sections were estimated from the reduction of the CHBr signal as a function of the excimer laser fluence. The derived 193 nm absorption cross section for CHBr [(3.24 ± 0.59) x 10~(-17) cm~2] is slightly higher than the absorption cross section previously determined for CHC1 [(2.6 ± 0.8) x 10~(-17) cm~2], but the difference is within the estimated uncertainties in the measured cross section.