Open AccessHIGH PRESSURE LOW TEMPERATURE LUMINESCENCE AND CRYSTAL PARAMETERS OF Na5Eu(WO4)4
Author(s) -
Changxin Guo,
Gui Hong-Bin,
Li Bi-Lin
Publication year - 1996
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.45.1409
Subject(s) - luminescence , hydrostatic pressure , materials science , crystal (programming language) , stoichiometry , hydrostatic equilibrium , single crystal , spectral line , line (geometry) , analytical chemistry (journal) , thermodynamics , nuclear magnetic resonance , chemistry , physics , optoelectronics , quantum mechanics , astronomy , chromatography , computer science , programming language , geometry , mathematics
Luminescence of Eu3+ in stoichiometric host luminescent crystal Na5Eu(WO4)4 has been studied under low temperature 20-300 K and hydrostatic high pressure 0 - 10 GPa using a diamon anvil high pressure and low temperature microspectroscopic system. We report for the pressure shift rates of spectral lines, energy levels and crystal field parameters of Eu3+ under low temperature. These pressure shift rates vary directly with temperature, and the experiment shows that the effects of temperature or pressure on the spectral lines of Eu3+ are not independent like that of R1 and R2 spectral line in ruby. According to crystal field theory, we have suggested a simplified method to derive the relations between energy levels and crystal parameters. The pressure shift rates of crystal parameters at low temperature(△Bkg/△p)T have been determined by fitting with the experimental spectral data.