Identification of Natural and Synthetic Diamonds from Their Optical Absorption and Cathodoluminescence Spectra

The optical absorption and cathodoluminescence spectra of nine diamond specimens are investigated at the temperatures 295 K and 82–295 K, respectively. By the presence of an N3a electron-vibrational system with a phonon-free line at 2.68 eV, six of them are identified as natural diamonds. By the pre...

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Bibliographic Details
Published in:Russian physics journal 2018-07, Vol.61 (3), p.469-483
Main Authors: Lipatov, E. I., Burachenko, A. G., Avdeev, S. M., Tarasenko, V. F., Bublik, M. A.
Format: Article
Language:English
Subjects:
ABSORPTION
CATHODOLUMINESCENCE
CHEMICAL VAPOR DEPOSITION
Condensed Matter Physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIAMONDS
ELECTRONS
EXCITONS
Hadrons
Heat treatment
HEAT TREATMENTS
Heavy Ions
IMPURITIES
Lasers
Luminescence
Mathematical and Computational Physics
NICKEL
NITROGEN
Nuclear Physics
Optical Devices
Optics
Organic chemistry
PHONONS
Photonics
Physics
Physics and Astronomy
PRESSURE RANGE MEGA PA 10-100
SPECTRA
Synthetic products
Theoretical
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Summary:The optical absorption and cathodoluminescence spectra of nine diamond specimens are investigated at the temperatures 295 K and 82–295 K, respectively. By the presence of an N3a electron-vibrational system with a phonon-free line at 2.68 eV, six of them are identified as natural diamonds. By the presence of the electron-vibrational system at 2.56 eV and a structureless band at 2.54 eV, associated with nickel in the optical absorption and luminescence spectra, two specimens are identified as synthetic diamonds grown at high pressures and temperatures. By the presence of exciton luminescence at 5.271 eV and the absence of any spectral, impurity-related peculiarities, one of the specimens is identified as a synthetic diamond grown by the chemical vapor deposition. Based on the data obtained, a procedure is proposed for identifying natural and synthetic diamonds and determining a model scheme of the radiation-thermal treatment of the specimens.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-018-1422-6