Kinetic properties of infrared and visible luminescence induced by electron beam in CsI:Tl crystal; Journal of Luminescence; Vol. 223

Kinetic properties of infrared and visible luminescence induced by electron beam in CsI:Tl crystal; Journal of Luminescence; Vol. 223

Bibliographische Detailangaben
Parent link:	Journal of Luminescence Vol. 223.— 2020.— [117183, 6 p.]
1. Verfasser:	Yakovlev V. Yu. Viktor Yurjevich
Körperschaft:	Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения
Weitere Verfasser:	Trefilova L. N. Larisa Nikolaevna
Zusammenfassung:	Title screen Presented are the results of comparative study of the decay kinetics for luminescence in the visible (350 [-:]700 nm) and infrared (1000[-:]1900 nm) spectral regions, which is excited in CsI:Tl crystals by a pulsed electron beam (Еm=250 keV, t1/2=15 ns, j=8 mJ/cm2). The infrared luminescence is assumed to be caused by radiative transition from the excited 62P3/2 state into the ground 62P1/2 state of Tl0 center. The decay kinetics of this luminescence at temperatures within 77[-:]450 К range is found to have two pronounced stages. One of them is exponential with a time constant characteristic for the given temperature and independent of Tl concentration within 0.018[-:]0.43 mass% range. The other stage has the same decay kinetics as that of the visible luminescence measured under the same conditions. In terms Tl0-Vk recombination giving rise to Tl-perturbed excitons, the visible luminescence arise due to disintegration of [(Tl)*,Vk] complexes, where Tl0 center has the populated [psi] sub-level of the 62P3/2 excited state. The exponential nature and rather long duration of the visible luminescence decay ([tau]= 700 ns) at room temperature are determined by the lifetime of Tl0 center in the excited metastable state. Режим доступа: по договору с организацией-держателем ресурса
Sprache:	Englisch
Veröffentlicht:	2020
Schlagworte:	электронный ресурс труды учёных ТПУ кинетические свойства люминесценция электронные пучки кристаллы спектры время жизни кинетика затухания
Online-Zugang:	https://doi.org/10.1016/j.jlumin.2020.117183
Format:	Elektronisch Buchkapitel
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665252

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