Luminescence of americium (III) and europium (III) in elpasolite structures

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:5774949

Chudnovskaya, G P; Gavrish, Yu I; Barbanel', Yu A

The luminescence (with laser excitation at /lambda/ = 337 nm) and self-luminescence spectra of a crystal of Cs/sub 2/NaLa(Am)Cl/sub 6/ (2.5 mole % /sup 243/Am), as well as the luminescence spectra of crystals of Cs/sub 3/NaLa(Eu)Cl/sub 6/ (1-5 mole % Eu) and Cs/sub 2//centered dot/ NaEuCl/sub 6/, have been obtained. The dependence of the spectra and the kinetics of the luminescence of Eu/sup (III)/ on the concentration of europium and the method used to synthesize the crystals has been studied. The fundamental similarity of the photoluminescence and self-luminescence spectra of Am/sup (III)/ has been noted, and the luminescence bands have been assigned to transitions between J levels with a 5f/sup 6/ configuration. The self-luminescence of americium in an elpasolite-type crystal of Cs/sub 2/NaLa(Am)Cl/sub 6/ should be regarded as a specific form of radioluminescence, whose main features are the structural specificity of the radiation, its high characteristicness (its assignment to a broad set of f-f transitions, including their Stark components) and its permanence, i.e., the absence of appreciable changes in the intensity and spectral composition during a prolonged period (4 years) of observation.

• OSTI ID: 5774949
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 30:1; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPOUNDS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALKALI METAL COMPOUNDS
ALPHA DECAY RADIOISOTOPES
AMERICIUM 243
AMERICIUM CHLORIDES
AMERICIUM COMPOUNDS
AMERICIUM ISOTOPES
CESIUM CHLORIDES
CESIUM COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
CRYSTALLIZATION
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
EUROPIUM CHLORIDES
EUROPIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HEAVY NUCLEI
ISOTOPES
LANTHANUM CHLORIDES
LANTHANUM COMPOUNDS
LASER RADIATION
LUMINESCENCE
MELTING
NUCLEI
ODD-EVEN NUCLEI
PHASE TRANSFORMATIONS
PHOTOLUMINESCENCE
RADIATIONS
RADIOISOTOPES
RADIOLUMINESCENCE
RARE EARTH COMPOUNDS
STARK EFFECT
TRANSPLUTONIUM COMPOUNDS
TRANSURANIUM COMPOUNDS
VALENCE
YEARS LIVING RADIOISOTOPES
ZONE MELTING