Spectral-kinetic properties of the x-ray luminescence of europium in fluorite
Journal Article
·
· J. Appl. Spectrosc. (Engl. Transl.); (United States)
This paper studies the luminescence of CaF/sub 2/-Eu excited by short (10 nsec) irradiation with x-rays in order to determine the energy transfer in the crystals from the base substance to the activator. Samples were used which had been grown with a technique reducing the concentration of impurity oxygen in the crystals. The concentration of the Eu/sub 2//sup +/ ions in the crystal was determined from the absorption coefficient at the 338-nm wavelength and monitored by electron paramagnetic resonance. It is shown that the mechanism of the excitation of Eu in CaF/sub 2/ depends significantly upon the state of the activator crystal. In order to obtain the highest light yield and specific kinetic characteristics of a CaF/sub 2/-Eu crystal phosphor, one must correctly select not only a certain impurity concentration but also the optimal ratio of divalent and trivalent europium ions in the crystal.
- OSTI ID:
- 6909693
- Journal Information:
- J. Appl. Spectrosc. (Engl. Transl.); (United States), Journal Name: J. Appl. Spectrosc. (Engl. Transl.); (United States) Vol. 44:3; ISSN JASYA
- Country of Publication:
- United States
- Language:
- English
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Wed Feb 14 23:00:00 EST 1973
· Can. J. Phys., v. 51, no. 4, pp. 382-388
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Mon Nov 01 23:00:00 EST 2004
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LUMINESCENCE OF ALKALI HALIDE PHOSPHORS ACTIVATED WITH EUROPIUM
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· Tr. Inst. Fiz. i Astron., Akad. Nauk Est. SSR
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Related Subjects
36 MATERIALS SCIENCE
360605* -- Materials-- Radiation Effects
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CRYSTAL DOPING
CRYSTALS
DOPED MATERIALS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EUROPIUM COMPOUNDS
EXCITATION
FLUORIDES
FLUORINE COMPOUNDS
FLUORITE
HALIDE MINERALS
HALIDES
HALOGEN COMPOUNDS
IMPURITIES
ION IMPLANTATION
IONIZING RADIATIONS
IRRADIATION
LUMINESCENCE
MAGNETIC RESONANCE
MATERIALS
METALLURGICAL EFFECTS
MINERALS
NONMETALS
OXYGEN
PHYSICAL RADIATION EFFECTS
PULSED IRRADIATION
QUANTITY RATIO
RADIATION EFFECTS
RADIATIONS
RADIOLUMINESCENCE
RARE EARTH COMPOUNDS
RESONANCE
SPECTRA
STIMULATED EMISSION
VALENCE
WAVELENGTHS
X RADIATION
360605* -- Materials-- Radiation Effects
ABSORPTION SPECTRA
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CRYSTAL DOPING
CRYSTALS
DOPED MATERIALS
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EUROPIUM COMPOUNDS
EXCITATION
FLUORIDES
FLUORINE COMPOUNDS
FLUORITE
HALIDE MINERALS
HALIDES
HALOGEN COMPOUNDS
IMPURITIES
ION IMPLANTATION
IONIZING RADIATIONS
IRRADIATION
LUMINESCENCE
MAGNETIC RESONANCE
MATERIALS
METALLURGICAL EFFECTS
MINERALS
NONMETALS
OXYGEN
PHYSICAL RADIATION EFFECTS
PULSED IRRADIATION
QUANTITY RATIO
RADIATION EFFECTS
RADIATIONS
RADIOLUMINESCENCE
RARE EARTH COMPOUNDS
RESONANCE
SPECTRA
STIMULATED EMISSION
VALENCE
WAVELENGTHS
X RADIATION