Luminescence of Eu2+-vc- dipoles and their associates in CsI:Eu crystals; Journal of Luminescence; Vol. 132, iss. 9

Luminescence of Eu2+-vc- dipoles and their associates in CsI:Eu crystals; Journal of Luminescence; Vol. 132, iss. 9

Dettagli Bibliografici
Parent link:Journal of Luminescence
Vol. 132, iss. 9.— 2012.— [P. 2476–2478]
Ente Autore: Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра сильноточной электроники (СЭ)
Altri autori: Yakovlev V. Yu. Viktor Yurjevich, Trefilova L. N. Larisa Nikolaevna, Мелешко А. А. Анна Алексеевна, Ovcharenko N. N. Nikolay Nikolaevich
Riassunto:Title screen
Spectral-kinetics properties of photo-scintillation excited with single light pulses of a nitrogen laser (λ=337.1 nm, t1/2=5 ns, Q=1 mJ) have been studied in CsI:Eu crystals at temperature within 80-300 K. It is found that the exponential decay of 463 nm emission band has a time constant which grows from 0.85 μs at 78 K to 1.6 μs at 380 K. Such an anomalous temperature behavior of 463 nm emission decay kinetics is discussed in terms of the crystal thermal expansion. It has been proposed that 463 nm emission is caused by a cluster center consisting of three dipoles Eu2+vc− bounded with each other in a hexagon. Owing to the exchange resonance in the cluster, the energy passes from an excited dipole to a non-excited one and the distance between them gets longer due to thermal expansion of the crystal.
Режим доступа: по договору с организацией-держателем ресурса
Lingua:inglese
Pubblicazione: 2012
Soggetti:
электронный ресурс
труды учёных ТПУ
люминесценция
Accesso online:http://dx.doi.org/10.1016/j.jlumin.2012.04.026
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=652815

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