Abstract
High-resolution Raman measurements were performed of the intramolecular vibrational transition in mixed crystals of (o-H2) x (p-H2)1-x and (o-D2) x (p-D2)1-x The spectra obtained clearly show the effect of coupling between the vibrational states of the two constituent molecules. Calculations of the line shapes by the coherent potential approximation and by diagonalization of the dynamical matrix of a 5324 molecule supercell are compared with the experimental results.