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

The jet-cooled m-fluorobenzyl radical was generated from m-fluorotoluene with a large amount of buffer gas He and vibronically excited in a corona excited supersonic expansion using a modified Engelking-type nozzle. The vibronic emission spectrum of the m-fluorobenzyl radical in the D1→D0 transition has been recorded with a long-path monochromator in the visible region. The spectrum was analyzed to obtain the vibrational mode frequencies in the ground electronic state by comparing with those from the ab initio calculation as well as those of m-fluorotoluene.