Accession Number : AD0711062

Title :   RARE EARTH ION PAIR ABSORPTION AT LOW CONCENTRATIONS IN LANTHANUM TRICHLORIDE.

Descriptive Note : Technical rept.,

Corporate Author : ALABAMA UNIV HUNTSVILLE RESEARCH INST

Personal Author(s) : Blatt,J. H.

Report Date : JUL 1970

Pagination or Media Count : 122

Abstract : Fluorescence following the absorption of a single 32,000/cm photon by a pair of rare earth dopant ions has been observed at 4.2K. These samples were LaCl3 doped with 1%Ho(3+) or with 1%Pr(3+), and double doped with 1%Ho(3+) and 1%Pr(3+), and were known to contain trace amounts of Nd(3+). The fluorescence and excitation spectra indicated that in the Ho(3+) doped sample, the ion pair process Ho(quintent F(5)) + Nd(quadruplet G(5/2)) was absorbing at 32,000/cm. In the Pr(3+) doped sample, evidence was seen for the process Pr(singlet D(2))+ Nd(doublet H(11/2)) and for a weak pair process involving the Pr(3+) level triplet P(0) or one connected to it and either Pr(3+) or Nd(3+) levels. Other combinations of ion pairs which are energetically possible were searched for but not observed. (Author)

Descriptors :   (*HOLMIUM, ELECTRON TRANSITIONS), (*PRASEODYMIUM, ELECTRON TRANSITIONS), (*RARE EARTH ELEMENTS, *ELECTRON TRANSITIONS), (*FLUORESCENCE, RARE EARTH ELEMENTS), LANTHANUM COMPOUNDS, DOPING, CHLORIDES, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, MOLECULAR ORBITALS, CRYSTAL DEFECTS, IMPURITIES, THESES

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE