PHOSPHORS ON THE BASIS OF HALIDE SALTS OF SOME SECOND-GROUP METALS

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Trudy Inst. Fiz. i Astron., Akad. Nauk Eston. S.S.R.

OSTI ID:4109800

Malysheva, A F

Absorption, excitation, and emission spectra, were investigated in phosphors of halide salts of some secondgroup metals activated with lead and thallium. The absorption (excitation) band maxima of these phosphors were compared with the electronic transitions in free lead and thallium ions. A slight difference was noted between the structures of the absorption spectra of this group of phosphors and alkali halide phosphors with the same activators. In particular, there was an absence of splitting (or the presence of very weak splitting) of the levels /sup 1/P/sub 1/ in the ions Tl/sup +/ and Pb/sup ++/ in the lattices of halide salts of the secondgroup metals (this despite the low symmetry of the lattices of the latter). A comparison of the emission spectra of thallium phosphors on the basis of halide salts of alkali and alkali earth metals led to the conclusion that one type of center exists in the second phosphor group, whereas it is possible that two types of centers exist in the first group. This difference was attributed to the different cation charges of the host crystals in these two groups of phosphors. Absorption spectra of the pure halide salts of firstand second-group metals were considered. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-007899
• OSTI ID: 4109800
• Journal Information: Trudy Inst. Fiz. i Astron., Akad. Nauk Eston. S.S.R., Journal Name: Trudy Inst. Fiz. i Astron., Akad. Nauk Eston. S.S.R. Vol. Vol: No. 12
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ALKALI METALS
ALKALINE EARTH METALS
CATIONS
CRYSTALS
DEFECTS
ELECTRIC CHARGES
ELECTRONS
EMISSION
ENERGY LEVELS
EXCITATION
HALIDES
IMPURITIES
IONS
LATTICES
LEAD
PHOSPHORS
PHYSICS
SPECTRA
THALLIUM
TRACE AMOUNTS