The study of radiation degradation of optical properties of non-stoichiometric Lu3.01−xYxAl4.99O12 crystals doped with Ce3+, Cr3+, and Sc3+ ions under the action of gamma radiation


Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

The spectra of pulsed cathodoluminescence (PCL) and optical transmission (OT) of crystals grown from Lu3.01−xYxAl4.99O12 melts doped with Cr3+, Ce3+, and Sc3+ ions before and after irradiation with gamma radiation of a 60Co radioactive source are studied. The gamma radiation dose absorbed by samples was 45 Mrad. The maximum gamma-radiation-induced absorbance in the range of 525–700 nm was 0.48 cm−1. Changes in the PCL and OT spectra of all samples after irradiation were detected. It was found that the relative intensity of Cr3+ bands increased after irradiation in relation to the Ce3+ band intensity by a factor of 1.6–8; the OT spectra of all samples after irradiation lost specific features and became identical. The results obtained are qualitatively explained. According to the explanation, the induced absorption is controlled first of all by optically active Frenkel defects formed after irradiation, which include an oxygen vacancy and an interstitial oxygen ion.

Sobre autores

S. Andreev

Lebedev Physical Institute

Email: pestovsky@phystech.edu
Rússia, Leninskii pr. 53, Moscow, 119991

M. Zavertyaev

Lebedev Physical Institute

Email: pestovsky@phystech.edu
Rússia, Leninskii pr. 53, Moscow, 119991

Yu. Zavartsev

Prokhorov General Physics Institue

Email: pestovsky@phystech.edu
Rússia, ul. Vaviliva 38, Moscow, 119991

A. Zagumenniy

Prokhorov General Physics Institue

Email: pestovsky@phystech.edu
Rússia, ul. Vaviliva 38, Moscow, 119991

V. Kozlov

Lebedev Physical Institute

Email: pestovsky@phystech.edu
Rússia, Leninskii pr. 53, Moscow, 119991

N. Pestovskii

Lebedev Physical Institute; Moscow Institute of Physics and Technology

Autor responsável pela correspondência
Email: pestovsky@phystech.edu
Rússia, Leninskii pr. 53, Moscow, 119991; Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700

S. Kutovoi

Prokhorov General Physics Institue

Email: pestovsky@phystech.edu
Rússia, ul. Vaviliva 38, Moscow, 119991

A. Petrov

Lebedev Physical Institute; Moscow Institute of Physics and Technology

Email: pestovsky@phystech.edu
Rússia, Leninskii pr. 53, Moscow, 119991; Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700

S. Savinov

Lebedev Physical Institute; Moscow Institute of Physics and Technology

Email: pestovsky@phystech.edu
Rússia, Leninskii pr. 53, Moscow, 119991; Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML

Declaração de direitos autorais © Allerton Press, Inc., 2016