Luminescence of LaBr3: Ce,Hf crystals under photon excitation in the ultraviolet, vacuum ultraviolet, and X-ray ranges / Pustovarov V. A.,Razumov A. N.,Vyprintsev D. I. // PHYSICS OF THE SOLID STATE. - 2014. - V. 56, l. 2. - P. 347-352.

ISSN/EISSN:

1063-7834 / 1090-6460

Type:

Article

Abstract:

This study has been carried out using synchrotron radiation, time-resolved luminescence ultraviolet and vacuum ultraviolet spectroscopy, optical absorption spectroscopy, and thermal activation spectroscopy. It has been found that, in scintillation spectrometric crystals LaBr3: Ce,Hf characterized by a low hygroscopicity, along with Ce3+ centers in regular lattice sites, there are Ce3+ centers located in the vicinity of the defects of the crystal structure. It has also been found that the studied crystals exhibit photoluminescence (PL) of new point defects responsible for a broad band at wavelengths of 500-600 nm in the PL spectra. The minimum energy of interband transitions in LaBr3 is estimated as E (g) similar to 6.2 eV. The effect of multiplication of electronic excitations has been observed in the range of PL excitation energies higher than 13 eV (more than 2E (g) ). Thermal activation studies have revealed channels of electronic excitation energy transfer to Ce3+ impurity centers.

Author keywords:

SPECTROSCOPY; SCINTILLATORS; CE3+

DOI:

10.1134/S1063783414020267

Web of Science ID:

ISI:000331700400021

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6460
Keywords-Plus	SPECTROSCOPY; SCINTILLATORS; CE3+
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	vpustovarov@bk.ru
Funding-Acknowledgement	Hamburg Synchrotron Radiation Laboratory HASYLAB at DESY (Hamburg, Germany) {[}II-20110050, II-20080119 EC]; Ministry of Education and Science of the Russian Federation {[}14.A18.21.0076]
Funding-Text	This study was supported in part by the Hamburg Synchrotron Radiation Laboratory HASYLAB at DESY (Hamburg, Germany) (project nos. II-20110050 and II-20080119 EC) and the Ministry of Education and Science of the Russian Federation (agreement no. 14.A18.21.0076).
Number-of-Cited-References	18
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	15
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	AB3OP