Modifications of Light Emission Spectra and Atomic Structure of Europium Molibdate Bulk Crystals Caused by High Pressure and Heat Treatment

Author

Shmurak, S.Z. ; Kiselev, A.P. ; Klassen, N.V. ; Sinitsyn, V.V. ; Shmyt´ko, I.M. ; Kin, B. S Red ; Khasanov, S.S.

Author_Institution

Inst. of Solid State Phys., Russian Acad. of Sci., Moscow

Volume

55

Issue

3

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1128

Lastpage

1132

Abstract

Essential enhancement of light emission ability of europium molybdate - Eu₂(MoO₄)₃ (EMO) crystals has been achieved by combined application of high pressure (9 GPa) and heat treatment (a procedure was repeated from 3 to 25 times for different samples). Multifold increase in light emission of EMO single crystals can be achieved, without deterioration of the optical transparency of the material. Simultaneously the light emission spectra change substantially. Nature of this phenomenon is explained by the modifications of the crystal field caused by structural transformations induced by the treatments. These modifications of the crystal fields bring to increase in probability of light emission optical transitions between 4f sublevels of europium ions.

Keywords

annealing; europium compounds; fluorescence; heat treatment; high-pressure effects; photoluminescence; solid scintillation detectors; solid-state phase transformations; transparency; Eu₂(MoO₄)₃; annealing; atomic structure; crystal field; deterioration; europium molibdate bulk crystals; heat treatment; high pressure effects; light emission optical transitions; light emission spectra; luminescence; optical transparency; scintillation detectors; structural phase transformations; Biomedical optical imaging; Crystalline materials; Crystals; Heat treatment; Luminescence; Optical materials; Particle beam optics; Powders; Scintillation counters; Stimulated emission; Annealing; europium compounds; luminescence; pressure effects; scintillation detectors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2008.924049

Filename

4545143