Abstract
A pure rotational -type transition () in solid parahydrogen has been recorded by using a high sensitivity infrared spectrometer. On the assumption of a rigid lattice, the measured intensity led to a value of 0.335 (in atomic units) for the hexadecapole moment of molecular hydrogen. Electric quadrupole-quadrupole interaction effects have been identified in the spectra. It appears possible to extract the phonon density of states in solid from the phonon branch .
- Received 20 July 1981
DOI:https://doi.org/10.1103/PhysRevLett.47.1277
©1981 American Physical Society