Accession Number : ADA191211

Title :   Statistical Fine Structure in the Inhomogeneously Broadened Electronic Origin of Pentacene in p-Terphenyl.

Descriptive Note : Technical rept.,

Corporate Author : IBM ALMADEN RESEARCH CENTER SAN JOSE CA

Personal Author(s) : Carter, T P ; Manavi, M ; Moerner, W E

PDF Url : ADA191211

Report Date : 29 Jan 1988

Pagination or Media Count : 49

Abstract : Recently, the first observation of statistical fine structure on an inhomogeneously broadened absorption profile was reported (W. E. Moerner, T.P. Carter, Phys.Rev.Lett.59,2705(1987) for mixed crystals of pentacene in p-terphenyl using laser FM spectroscopy. Statistical fine structure is time-independent structure on the inhomogeneous line caused by statistical variations, in the spectral density of absorbers in each frequency interval. In this work, a model and an analysis of statistical fine structure using autocorrelation techniques are presented, and the dependence of the effect for pentacene in p-terphenyl at 1.4K on modulating frequency, detection phase, sample position, center concentration, and site is described. Keywords: Statistical fine structure, Inhomogeneous broadening, Molecular spectroscopy, Defects, Solids.

Descriptors :   *ABSORPTION SPECTRA, *CRYSTAL STRUCTURE, *ANTHRACENES, *BENZYL RADICALS, ABSORBERS(MATERIALS), AUTOCORRELATION, CRYSTALS, DETECTION, FREQUENCY, FREQUENCY MODULATION, INTERVALS, LASERS, MIXING, MOLECULAR SPECTROSCOPY, OBSERVATION, SOLIDS, SPECTRAL ENERGY DISTRIBUTION, SPECTROSCOPY, STATISTICAL ANALYSIS, STATISTICS, VARIATIONAL METHODS, BENZENE, PHENYL RADICALS, CRYSTAL DEFECTS, COLLISION BROADENING

Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE