Resolved emission from compound states in heavily doped isotopic mixed benzene crystals

Publisher Website
Google Scholar
Abstract
The 4·2 K fluorescence spectra of C6H6/C6H5D mixed crystals were studied as a function of concentration. The results were compared to theoretical predictions based upon coherent potential approximation (CPA) calculations of partial density-of-states functions. The separation of the emission from each ‘partial density-of-states’ into resolved spectral features has established the physical significance of these functions. The excellent quantitative agreement between the experimental and theoretical results indicated the validity of both the ideal mixed crystal hamiltonian (H) and the CPA for the calculation of benzene mixed crystal density-of-states functions, even at concentrations as low as 5 per cent C6H6. These new experiments have also confirmed the validity of the previously determined pure crystal density-of-states and band mean for the S1 (0, 0) band of crystalline benzene.