Vibrational dephasing in liquid ethane-d6

Publisher Website
Google Scholar
Abstract
The spontaneous Raman spectrum of liquid C2D6 has been obtained. The ν2 and ν3 isotropic bands have been analyzed by a memory‐functions procedure. The analysis suggests that the vibrational dephasing arises from rotation about the symmetry axis. The tumbling of the symmetry axis is much slower, and in the case of the ν3 band leads to ’’homogeneous narrowing.’’ The 2ν2 overtone bandwidth was found to have a first‐power dependence on the vibrational quantum number. The depolarization ratio of the ν3 band is 0.14; the ν2 band has a depolarization ratio less than 0.02.