THE DYNAMICS PROPERTIES ON LUMINESCENCE OF CeF3 CRYSTALS

2002 ◽  
Vol 09 (01) ◽  
pp. 371-374 ◽  
Author(s):  
CHAOSHU SHI ◽  
GUOBIN ZHANG ◽  
YAGUANG WEI ◽  
ZHENGFU HAN ◽  
JUNYAN SHI ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Temperature Dependence ◽  
Decay Time ◽  
Emission Band ◽  
Emission Spectra ◽  
Luminescence Decay ◽  
Luminescence Decay Time ◽  
Excitation Spectra ◽  
Defect Centers

This paper presents temperature dependence of emission spectra (290 nm and 340 nm bands), excitation spectra (250–3000 Å), luminescence decay time as well as their excitation effect for CeF 3 crystals. The results indicate that energy transfer from Ce 3+ to defect centers in the CeF 3 crystals was very efficient as temperature increased. The 340 nm emission band may originate from some defects near Ce 3+, rather than Ce 3+ perturbed defects.

Temperature Dependence of Luminescence Decay Time of InP Quantum Disks

1999 ◽  
Vol 38 (Part 1, No. 2B) ◽  
pp. 1094-1097 ◽  
Author(s):  
Tsuyoshi Okuno ◽  
Hong-Wen Ren ◽  
Mitsuru Sugisaki ◽  
Kenichi Nishi ◽  
Shigeo Sugou ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time ◽  
Quantum Disks

Temperature Dependence of the Luminescence Decay Time of a PbWO 4 Scintillator

1998 ◽  
Vol 15 (6) ◽  
pp. 455-456 ◽  
Author(s):  
Chao-shu Shi ◽  
Jie Deng ◽  
Zheng-fu Han ◽  
Zhi-jian Xie ◽  
Jing-ying Liao ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time

Homogeneous Luminescence Decay Time-Based Assay Using Energy Transfer from Nanospheres

2002 ◽  
Vol 74 (9) ◽  
pp. 2151-2156 ◽  
Author(s):  
Jens M. Kürner ◽  
Otto S. Wolfbeis ◽  
Ingo Klimant
Keyword(s):  
Energy Transfer ◽  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time

SCINTILLATION DECAY IN CALCIUM TUNGSTATE

1965 ◽  
Vol 43 (11) ◽  
pp. 1925-1933 ◽  
Author(s):  
M. Sayer ◽  
W. R. Hardy
Keyword(s):  
Temperature Dependence ◽  
Single Crystals ◽  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time ◽  
Γ Radiation ◽  
Calcium Tungstate ◽  
Γ Ray ◽  
Nonradiative Centers

Measurements of the luminescence decay time have been made for a number of single crystals of calcium tungstate for excitation by cathode rays, α and γ radiation. The value of the decay time was found to depend both on the crystal used and on the nature of the excitation. For γ-ray excitation, the decay time was in the range 6.1 to 6.8 μ sec. The values obtained for cathode-ray excitation were, in general, 20–30% higher for all crystals, while for α excitation, several crystals showed no change in decay time, while others showed a decay time 20% faster. Measurements of the temperature dependence of the decay time and thermoluminescence experiments indicate that these differences in behavior can be attributed to differences in the density of energy traps and nonradiative centers in the crystal and to a rise in temperature in the excited channel.

Temperature dependence of luminescence decay time of benzyl

1976 ◽  
Vol 11 (5-6) ◽  
pp. 331-337 ◽  
Author(s):  
A.A. Avdeenko ◽  
T.L. Dobrovolskaya ◽  
V.A. Kultchitsky ◽  
Yu.V. Naboikin ◽  
S.N. Pakulov
Keyword(s):  
Temperature Dependence ◽  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time

scholarly journals Quenching of the Eu3+ Luminescence by Cu2+ Ions in the Nanosized Hydroxyapatite Designed for Future Bio-Detection

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 464
Author(s):  
Katarzyna Szyszka ◽  
Sara Targońska ◽  
Agnieszka Lewińska ◽  
Adam Watras ◽  
Rafal J. Wiglusz
Keyword(s):  
Decay Time ◽  
Emission Spectra ◽  
Luminescence Decay ◽  
Morphological Properties ◽  
Luminescence Decay Time ◽  
Quenching Mechanism ◽  
Paramagnetic Resonance ◽  
Cell Parameters ◽  
Doped Materials ◽  
Co Doped

The hydroxyapatite nanopowders of the Eu3+-doped, Cu2+-doped, and Eu3+/Cu2+-co-doped Ca10(PO4)6(OH)2 were prepared by a microwave-assisted hydrothermal method. The structural and morphological properties of the products were investigated by X-ray powder diffraction (XRD), transmission electron microscopy techniques (TEM), and infrared spectroscopy (FT-IR). The average crystal size and the unit cell parameters were calculated by a Rietveld refinement tool. The absorption, emission excitation, emission, and luminescence decay time were recorded and studied in detail. The 5D0 → 7F2 transition is the most intense transition. The Eu3+ ions occupied two independent crystallographic sites in these materials exhibited in emission spectra: one Ca(1) site with C3 symmetry and one Ca(2) sites with Cs symmetry. The Eu3+ emission is strongly quenched by Cu2+ ions, and the luminescence decay time is much shorter in the case of Eu3+/Cu2+ co-doped materials than in Eu3+-doped materials. The luminescence quenching mechanism as well as the schematic energy level diagram showing the Eu3+ emission quenching mechanism using Cu2+ ions are proposed. The electron paramagnetic resonance (EPR) technique revealed the existence of at least two different coordination environments for copper(II) ion.

A new lanthanum oxysulfide-based IR phosphor with a controlled luminescence decay time

2015 ◽  
Vol 51 (5) ◽  
pp. 466-472 ◽  
Author(s):  
O. Ya. Manashirov ◽  
E. M. Zvereva ◽  
A. N. Lobanov
Keyword(s):  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time
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