Vibronic analysis of the jet-cooled emission spectrum of p-fluorobenzyl radical in the D1→D0 transition

The p-fluorobenzyl radical was generated and vibronically excited in the jet from the gas mixture of p-fluorotoluene and a carrier gas helium in a corona excited supersonic expansion. The vibronic emission spectrum of the jet-cooled p-fluorobenzyl radical in the D1→D0 transition has been observed and analyzed to obtain accurate vibrational frequencies in the ground electronic state by comparing with those of p-fluorotoluene as well as those from the ab initio calculation.