Energy Disposal in Photodissociation of Nitrosobenzene

The rotational spectra of the nascent NO(X2　Πv″=1,2,3) product from the photolysis of nitrosobenzene(C6H5NO)have been recorded by using the single-photon laser-induced fluorescence (LIF) technique. The rotational temperature and the relative ratio of vibrational population of the nascent NO(X2　Π) photofragment were obtained by probing the internal-state distribution of the fragment. The energy disposal in the photodissociation of nitrosobenzene at 266 nm was studied. In contrast to small molecule, the large-size molecule C6H5NO, gives rise to a broad-energy distribution involving all degrees of freedom in photodissociation.