Vibrational excitation of groundhyphen;statephyphen;difluorobenzene in collisions with He

摘要

Crossed molecular beam experiments on statehyphen;resolved vibrational excitation ofS0phyphen;difluorobenzene show onlyv=0rarr;1,2 excitation of mode 30, the inhyphen;phase bend of the fluorine atoms perpendicular to the benzene plane. This high degree of mode 30 selectivity in transitions from the rotationally cold vibrational ground state suggests that efficient and modehyphen;specific transfer of vibrational energy in collisions of polyatomic molecules need not depend strongly on intramolecular level mixing.