Neutron-induced molecular defect O-2(-) in beryllium orthogermanate / Zatsepin A. F.,Blaginina L. A.,Kukharenko A. I.,Pustovarov V. A.,Cholakh S. O. // PHYSICS OF THE SOLID STATE. - 2007. - V. 49, l. 5. - P. 839-844.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

Be2GeO4 polycrystalline samples preliminarily irradiated by fast neutrons (E similar to 1 MeV, Phi = 4.5 x 10(17) cm(-2)) were studied by photoluminescence spectroscopy using synchrotron radiation pulses for excitation. The neutron-induced luminescence band observed at 1.7 eV in the spectra of the irradiated samples is assigned to the radiative relaxation of a molecular ion O-2(-). The luminescence of these defects in the Be2GeO4 structure is effectively excited by 4.7-and 5.2-eV photons. At low temperatures (10 K), the profiles of the photoluminescence and excitation bands have a fine structure characteristic of electron-vibration interactions. The vibration frequencies for the ground state (v(1) = 161 cm(-1)) and two excited states (v(2) = 672 cm(-1) and v(3) = 887-1451 cm(-1)) were measured. Potential curves of the energy states of the O-2(-) center are constructed in terms of the Morse model using the experimental data. The optical spectrum fine structure is shown to be predominantly due to intrinsic vibrations of the molecular defect.

Author keywords:

ALKALI-HALIDE CRYSTALS; EXCITED-STATE; ION; QUARTZ; OXYGEN

DOI:

10.1134/S106378340705006X

Web of Science ID:

ISI:000246525200006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	ALKALI-HALIDE CRYSTALS; EXCITED-STATE; ION; QUARTZ; OXYGEN
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	zats@dpt.ustu.ru
ResearcherID-Numbers	Cholakh, Seif/M-8221-2016 Kukharenko, Andrey/M-8256-2016 Zatsepin, Anatoly/L-7335-2016
ORCID-Numbers	Cholakh, Seif/0000-0002-9313-6614 Kukharenko, Andrey/0000-0003-3774-6909 Zatsepin, Anatoly/0000-0001-9539-2403
Number-of-Cited-References	28
Usage-Count-Since-2013	5
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	168LD