Reinvestigation of the Luminescence Spectra of CdCl2:Mn2+ Single Crystals

1980 ◽  
Vol 102 (2) ◽  
pp. K89-K93 ◽  
Author(s):  
B. Ghosh ◽  
R. K. Mukherjee
Keyword(s):  
Single Crystals ◽  
Luminescence Spectra

Effect of electron and neutron bombardment on the orange luminescence spectra of not specially doped and copper-doped cadmium sulfide single crystals

1997 ◽  
Vol 31 (4) ◽  
pp. 326-328 ◽  
Author(s):  
G. E. Davidyuk ◽  
V. S. Manzhara ◽  
N. S. Bogdanyuk ◽  
A. P. Shavarova ◽  
V. V. Bulatetskii
Keyword(s):  
Cadmium Sulfide ◽  
Single Crystals ◽  
Luminescence Spectra ◽  
Neutron Bombardment ◽  
Orange Luminescence

Thermoluminescence and X-Ray Stimulated Luminescence of CaF2:Eu Crystals

1973 ◽  
Vol 51 (4) ◽  
pp. 382-388 ◽  
Author(s):  
R. W. Ward ◽  
P. W. Whippey
Keyword(s):  
Spectral Analysis ◽  
Rare Earth ◽  
Single Crystals ◽  
Rare Earth Ions ◽  
Recombination Process ◽  
Emission Lines ◽  
Luminescence Spectra ◽  
X Ray ◽  
Trivalent Rare Earth ◽  
The Eu

The X-ray luminescence and thermoluminescence due to Eu ions in CaF2 have been investigated. Thermoluminescent glow curves of CaF2 single crystals containing several different concentrations of europium have been measured between 4.2 K and 400 K. Spectral analysis of the two major glow peaks at 92 K and 240 K shows that the luminescence is due mainly to Eu2+ ions. The available evidence suggests the thermoluminescence of Eu2+ in CaF2 is a hole-type recombination process similar to the generally accepted mechanism for thermoluminescence from trivalent rare-earth ions in CaF2. In addition to the Eu2+ emission, lines are observed at lower energies in the X-ray luminescence spectra due to Eu3+ ions in at least three different symmetry sites.

SPECTROSCOPIC STUDIES OF EXCHANGE INTERACTIONS IN POLYNUCLEAR TRANSITION METAL COMPLEXES I. [(NH3)5Cr(OH)Cr(NH3)5] Cl5,3H20.

1973 ◽  
Vol 26 (3) ◽  
pp. 505 ◽  
Author(s):  
J Ferguson ◽  
HU Gudel
Keyword(s):  
Absorption Spectrum ◽  
Single Crystals ◽  
Transition Metal Complexes ◽  
Level Scheme ◽  
Exchange Interactions ◽  
Spectroscopic Properties ◽  
Spectroscopic Studies ◽  
Luminescence Spectra ◽  
Weakly Coupled ◽  
Chloride Trihydrate

Large single crystals of ,u-hydroxo-bis[pentaamminechromium(III) chloride trihydrate have been prepared and their spectroscopic properties determined. The analysis of polarized single-crystal luminescence spectra provides an accurate ground electronic level scheme for the weakly coupled chromium ions in the dimeric cluster. The splitting is described by the isotropic Hamiltonian X = JS,.Sb-j(S,.Sb)2 with J = 31.9 cm-1 and j = 0.23 cm-1. The temperature dependence of the polarized absorption spectrum is consistent with this level scheme. The positions of the components of the singly excited (4A2-2E) state have been determined.

Luminescent Properties of As-Grown and Vacuum Annealed LiNbO3 Single Crystals

2013 ◽  
Vol 200 ◽  
pp. 199-202
Author(s):  
Dmytro Yu. Sugak ◽  
Andriy P. Luchechko
Keyword(s):  
Single Crystals ◽  
Room Temperature ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Annealed Sample ◽  
Luminescence Spectra ◽  
Excitation Spectra ◽  
X Ray ◽  
Grown Sample ◽  
Different Types

This paper reports on the luminescent properties of the congruent as-grown and vacuum annealed LiNbO3 single crystals at the UV and X-ray excitations. The shape of excitation spectra is similar for all emission bands in as-grown sample as well as in vacuum annealed sample. The emission spectra (exc=235 nm) observed in the spectral region 250…800 nm at room temperature consist of five elementary bands. Correlation of the relative intensities bands in luminescence spectra under different types of excitation and their temperature dependencies were determined. The most intensitive maxima in as-grown sample are observed at 295 and 691 nm. The main maximum after vacuum annealing is peaked around 295 nm.

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