Subnanosecond Scintillations in Diamond

1994 ◽  
Vol 348 ◽  
Author(s):  
Vladimir Gavrilov ◽  
Eduard Aluker ◽  
Stanislav Chernov
Keyword(s):  
Luminescence Spectra ◽  
Electron Lifetime ◽  
Band Electron ◽  
Synthetic Diamonds ◽  
Kinetics Of ◽  
Natural And Synthetic

ABSTRACTData about fast luminescence of natural and synthetic diamonds are presented. Analysis of the luminescence spectra and the kinetics of both the luminescence and pulse conductivity leads to the conclusion that these processes are determined by the band electron lifetime.

Application of a KrCl-excilamp (222 nm) for identification of natural and synthetic diamonds

2009 ◽  
Author(s):  
Eduard A. Sosnin ◽  
Eugenii I. Lipatov ◽  
Sergei M. Avdeev ◽  
Victor F. Tarasenko ◽  
Yuri N. Novoselov
Keyword(s):  
Synthetic Diamonds ◽  
Natural And Synthetic

FEATURES OF KINETICS OF PROBIOTIC STRAIN LACTOBACILLUS BREVIS UNDER IMMOBILIZATION CONDITIONS ON NATURAL AND SYNTHETIC CARRIERS

2020 ◽  
pp. 38-40
Author(s):  
A. Vasilieva
Keyword(s):  
Growth Kinetics ◽  
Probiotic Strain ◽  
Lactobacillus Brevis ◽  
Kinetics Of ◽  
Modified Forms ◽  
Natural And Synthetic

The growth kinetics of Lactobacillus brevis were obtained under conditions of immobilization on a schungite carrier, polyvinylpyrrolidone and bioceramics. The mechanisms of adsorption of lactobacilli in accordance with modified forms of schungite rocks were studied. The experiment was performed under conditions of periodic cultivation using a personal RTS-1 bioreactor (BioSan).

Identification Characteristics of Natural and Synthetic Diamonds Investigated by DiamondViewTM

2015 ◽  
Vol 35 (10) ◽  
pp. 1016002
Author(s):  
严俊 Yan Jun ◽  
刘晓波 Liu Xiaobo ◽  
陶金波 Tao Jinbo ◽  
张铮 Zhang Zheng ◽  
严雪俊 Yan Xuejun ◽  
...  
Keyword(s):  
Synthetic Diamonds ◽  
Natural And Synthetic

Identification of natural and synthetic diamonds by cathodoluminescence spectra

2018 ◽  
Author(s):  
Evgeniy I. Lipatov ◽  
Alexander G. Burachenko ◽  
Sergey M. Avdeev ◽  
Victor F. Tarasenko ◽  
Michael A. Bublik
Keyword(s):  
Synthetic Diamonds ◽  
Natural And Synthetic

scholarly journals Kinetics of luminescence calcium gallate activated by Yb3+, Er3+ ions

2020 ◽  
Vol 23 (3) ◽  
pp. 213-221
Author(s):  
A. P. Mar`in ◽  
U. A. Mar`ina ◽  
V. A. Vorob`ev ◽  
R. V. Pigulev
Keyword(s):  
Rare Earth ◽  
Luminescence Intensity ◽  
Luminescent Properties ◽  
Rare Earth Ions ◽  
Luminescence Spectra ◽  
Excitation Spectra ◽  
Semiconductor Laser Diode ◽  
Intracenter Luminescence ◽  
Trivalent Rare Earth ◽  
Kinetics Of

The paper presents the results of a study of the luminescent properties of calcium gallate activated by trivalent rare earth ions Yb3+ and Er3+. IR luminescence spectra of samples with a single activator Ca1‑хYbxGa2O4,Ca1‑хErxGa2O4 were studied when excited by radiation sources with a wavelength of 940 and 790 nm, respectively. The dependence of the luminescence intensity of samples on the concentration of rare earth ions is obtained. When the two-activator composition of Ca1‑х‑yYbxEryGa2O4 is excited by a semiconductor laser diode with a wavelength of 940 nm, IR luminescence is registered in the regions of 980-1100 nm and 1450-1670 nm. The radiation in these bands corresponds to electronic transitions in Yb3+ and Er3+ ions, respectively. For a luminescence band with a maximum at a wavelength of 1540 nm, the excitation spectra were measured, the maximum intensity is at the wavelengths: 930, 941, 970, 980 nm. The dependence of the IR luminescence intensity of a solid solution of Ca1‑х‑yYbxEryGa2O4 on the concentration of Er3+ ions was studied. With an increase in the concentration of Er3+ ions in the luminescence spectra, there is a redistribution in the intensity of the bands belonging to Yb3+ and Er3+ ions, which indicates the presence of energy transfer processes between these ions. The kinetics of IR luminescence attenuation was studied for series with one and two activators: Ca1‑хYbxGa2O4,Ca1‑хErxGa2O4, Ca1‑х‑yYbxEryGa2O4. It is established that the luminescence attenuation occurs mainly according to the exponential law, which indicates the predominance of the intracenter luminescence mechanism in the studied structures. Based on the analysis of the excitation and luminescence spectra of experimental samples, conclusions are made about the interaction of Yb3+ and Er3+ activator ions in the crystal lattice of calcium gallate.

scholarly journals A Chart for the Separation Of Natural and Synthetic Diamonds

1995 ◽  
Vol 31 (4) ◽  
pp. 256-264 ◽  
Author(s):  
James E. Shigley ◽  
Emmanuel Fritsch ◽  
Ilene Reinitz ◽  
Thomas M. Moses
Keyword(s):  
Synthetic Diamonds ◽  
Natural And Synthetic
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