Accession Number : ADA183652


Title :   Statistical Fine Structure of Inhomogeneously Broadened Absorption Lines.


Descriptive Note : Technical rept.,


Corporate Author : IBM ALMADEN RESEARCH CENTER SAN JOSE CA


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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a183652.pdf


Report Date : 31 Jul 1987


Pagination or Media Count : 15


Abstract : Using laser frequency-modulation spectroscopy; we have observed statistical fine structure (SFS) in the inhomogeneously broadened optical absorption of pentacene in p-terphenyl at liquid helium temperatures. SFS is the actual frequency-dependent, time-independent structure of the inhomogeneous line caused by the randomly varying number of centers in each frequency interval. The size of the SFS varies as the square root of the number of centers, and the autocorrelation of the SFS yields and estimate of the homogeneous linewidth without requiring spectral hole-burning or coherent transients. Keywords: Spectroscopy of defects in solids; Molecular spectroscopy; Statistical effects.


Descriptors :   *ABSORPTION SPECTRA , *MOLECULAR SPECTROSCOPY , *ACETYLENES , ABSORPTION , AUTOCORRELATION , COHERENCE , DEFECTS(MATERIALS) , FREQUENCY , HOMOGENEITY , INTERVALS , LINE SPECTRA , LIQUID HELIUM , OPTICAL PROPERTIES , SPECTRAL LINES , SPECTROSCOPY , SQUARE ROOTS , STATISTICS , TEMPERATURE , TRANSIENTS , CRYSTAL DEFECTS , DEFECT ANALYSIS , CRYOGENICS


Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Organic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE