Accession Number : AD0758827

Title :   Effects of Slow Vibrational Relaxation on Anomalous Stokes'-Shifted Luminescence and Energy Transfer in Solids,

Corporate Author : ROCHESTER UNIV N Y DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Dexter,D. L.

Report Date : 1973

Pagination or Media Count : 19

Abstract : An analysis is presented of the emission spectrum to be expected from model centers in vibrationally excited and electronically excited states. It is shown that for centers which normally exhibit a sizable Stokes' shift there will be, for a short time following excitation, a large component of emission at approximately twice the usual Stokes' shift. This anomalous emission would be detectable by ultra-fast (pico-second) excitation and detection, and in selected systems by conventional means. Its measurement would provide an estimate of the vibrational relaxation time of the center. The implications of the relaxation rate on electronic energy transfer between like species are briefly discussed. (Author)

Descriptors :   (*CRYSTAL DEFECTS, ELECTRON TRANSITIONS), IMPURITIES, EXCITATION, RELAXATION TIME, PHONONS, NUMERICAL ANALYSIS, LUMINESCENCE

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE