Synthesis, thermoluminescence and defect centres in Eu3+doped Y2O3nanophosphor for gamma dosimetry applications

2017 ◽  
Vol 4 (11) ◽  
pp. 115033 ◽  
Author(s):  
N J Shivaramu ◽  
B N Lakshminarasappa ◽  
K R Nagabhushana ◽  
Fouran Singh ◽  
H C Swart
Keyword(s):  
Defect Centres

EPR spectra and defect states in glasses of the GexS100-x system

1982 ◽  
Vol 47 (7) ◽  
pp. 1787-1793 ◽  
Author(s):  
Miloslav Frumar ◽  
Gustáv Plesch ◽  
Eva Černošková ◽  
Václav Černý ◽  
Ladislav Tichý ◽  
...  
Keyword(s):  
Experimental Data ◽  
Epr Spectra ◽  
Defect States ◽  
Composition Region ◽  
Active Defect ◽  
Temperature Conditions ◽  
Defect Centres

Glasses of the GexS100-x system were studied in the region of 30 ⪬ x ⪬ 45. The concept of magnetically active defect centres was employed to account for the EPR spectra of pure samples as well as those doped with silver or iodine, prepared in different temperature conditions. In terms of this concept a consistent interpretation of the experimental data could be given for the composition region applied.

Identification of defect centres using TSL, PL, OSL and ESR studies in LiAlO2based phosphors

2008 ◽  
Vol 41 (11) ◽  
pp. 115414 ◽  
Author(s):  
Bhushan Dhabekar ◽  
E Alagu Raja ◽  
Sanjeev Menon ◽  
T K Gundu Rao ◽  
R K Kher ◽  
...  
Keyword(s):  
Defect Centres

Magneto-optical properties of defect centres in alkali halide crystals

1967 ◽  
Vol 300 (1460) ◽  
pp. 78-93 ◽  
Keyword(s):  
Optical Absorption ◽  
Silver Atom ◽  
Alkali Halides ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Constant ◽  
Absorption Bands ◽  
Optical Effects ◽  
Alkali Halide Crystals ◽  
Defect Centres

Zeeman spectroscopy is not practicable for the investigation of the structure of electronic conventional states which give rise to broad optical absorption bands in solids. We have investigated the application of Faraday rotation and circular dichroism techniques to absorption bands of neutral silver atoms and F centres in alkali halides. These centres give rise to optical absorption bands due to transitions of the type 2 S → 2 P which are 2000 to 6000 cm -1 in width because, in part, of strong coupling to lattice phonons. A discussion is given of information which may be obtained concerning the electonic states involved in the 2 S → 2 P transition by analysis of the magneto-optical effects by the method of moments. It is shown, for example, that the spin-orbit coupling constant of the 2 P state of the silver atom is reduced from 613 cm -1 in the free state to 365 cm -1 in KCl, to 102 cm -1 in KBr and to an unmeasurably small value in KI. This cancellation of spin-orbit interaction of the silver atom is assigned to symmetry allowed admixtures of lattice ion wavefunctions into the 2 P state.

Infrared absorption by the single nitrogen and A defect centres in diamond

1994 ◽  
Vol 69 (6) ◽  
pp. 1141-1147 ◽  
Author(s):  
I. Kiflawi ◽  
A. E. Mayer ◽  
P. M. Spear ◽  
J. A. Van Wyk ◽  
G. S. Woods
Keyword(s):  
Infrared Absorption ◽  
Defect Centres

Infrared luminescence, thermoluminescence and defect centres in Er and Yb co-doped ZnAl2O4 phosphor

2009 ◽  
Vol 98 (1) ◽  
pp. 165-172 ◽  
Author(s):  
V. Singh ◽  
S. Watanabe ◽  
T. K. Gundu Rao ◽  
J. F. D. Chubaci ◽  
I. Ledoux-Rak ◽  
...  
Keyword(s):  
Infrared Luminescence ◽  
Defect Centres ◽  
Co Doped

Electron Spin Resonance of Defect Centres in CaSO4:Dy

1986 ◽  
Vol 17 (1-4) ◽  
pp. 465-468 ◽  
Author(s):  
J.F. Boas ◽  
R.J. Danby ◽  
J.G. Young
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Defect Centres

Zeeman patterns of defect centres in crystals

Physica ◽  
1967 ◽  
Vol 33 (1) ◽  
pp. 287-288 ◽  
Author(s):  
W.A. Runciman
Keyword(s):  
Defect Centres
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