Short-living absorption and emission of CsI(Na); Journal of Luminescence; Vol. 131, iss. 12

Short-living absorption and emission of CsI(Na); Journal of Luminescence; Vol. 131, iss. 12

Détails bibliographiques
Parent link:Journal of Luminescence
Vol. 131, iss. 12.— 2011.— [P. 2579-2581]
Autres auteurs: Yakovlev V. Yu. Viktor Yurjevich, Trefilova L. N. Larisa Nikolaevna, Мелешко А. А. Анна Алексеевна, Ganzha Yu. S. Yury Sergeevich
Résumé:Title screen
This paper investigates the short-living absorption and the emission of CsI(Na) under a pulsed electron beam (Еe=0.25 MeV, t1/2=15 ns and W=0.003…0.16 J/cm2). The bands of singlet self-trapped excitons, as well as Na0 and Vk color centers have been detected in the transient absorption spectrum of CsI(Na). It has been found that the activator luminescence spectrum, peaking at 3.0 eV, fits a Gaussian (Em=3.0 eV and FWHM=0.44±0.02 eV at 80 K) and remains the same at different time delays within 10−8-10−3 s. The decay kinetics of the 3.0 eV emission has one nanosecond exponential component and two microsecond ones with time constants 1.0 and 3.0 μs, which remain unchanged within 78-150 K. It is concluded that the activator emission is due to the radiative annihilation of sodium-perturbed two halide excitons from the non-relaxed singlet state. The pathways of such excitons creation are discussed.
Режим доступа: по договору с организацией-держателем ресурса
Langue:anglais
Publié: 2011
Sujets:
электронный ресурс
труды учёных ТПУ
люминесценция
Accès en ligne:http://dx.doi.org/10.1016/j.jlumin.2011.06.037
Format: Électronique Chapitre de livre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=652818

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