Accession Number : AD0283323

Title :   Molecular Amplifiers and Generators.

Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON N J

Report Date : 15 JUL 1962

Pagination or Media Count : 1

Abstract : The valence state of the holmium ion in CaF2 which causes the reported strong spectrum was identified as a divalent. There is a discrepancy between the experimental and theoretical g-values (5.91 and 6.0 respectively). Ho2+:CaF2 may be used as a powdered maser material for amplifiers below 5 kmc. The linewidth is comparable with ruby linewidths while the relaxation time (T sub 1) is about 1000 times shorterAT 4.2 K. Since it has 4 times as many energy levels as ruby and because larger idler to signal ratios are possible using ruby, the Q sub M of Ho2+:CaF2 at equal concentrations is expected to be about 10 times the value of Q sub M for ruby. Dy:CaF2 may have an energy quartet lying lowest and would be a candidate for masers in the millimeter wavelength range. Because of the many existing sites, the paramagnetic spectrum is very complicated and it is difficult to identify the quartet. An energy doublet is located at 265 ! 50 kmc above the ground state for the dysprosium ion in the cubic site. Dy, Er and Tb have been successfully incorporated into the rutile lattice. Er and Tb may be useful as idler doping ions. The dysprosium lines saturate very easily and could possibly make a good maser material. (Author)

Descriptors :   *MASERS, *MOLECULAR ELECTRONICS, *RADIOFREQUENCY GENERATORS, CALCIUM COMPOUNDS, DIOXIDES, DYSPROSIUM, ERBIUM, FLUORIDES, HOLMIUM, IMPURITIES, IONS, PARAMAGNETIC RESONANCE, RARE EARTH ELEMENTS, TERBIUM, TITANIUM COMPOUNDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE