Structure of the short-lived absorption and luminescence spectra of barium and calcium fluorides accompanying pulsed electron irradiation

Результат исследований: Материалы для журналаСтатьярецензирование

4 Цитирования (Scopus)

Аннотация

It is established that the optical absorption in the hole and electron components of autolocalized excitons in BaF 2 excited by a pulsed electron beam consists of a collection of overlapping bands with a half-width no greater than 0.1 eV. Simultaneous subexcitation with the stimulated emission of II-VI semiconductors made it possible to isolate three groups of bands, caused, by analogy with CaF 2 [Phys. Solid State 39, 1060 (1997)], by different configurations of autolocalized excitons in the fluorite lattice. The process of radiative decay of autolocalized excitons in CaF 2 and BaF 2 when they are optically excited in the region of the electron component of the absorption has been detected. The spectral rate parameters of the radiation that appears during simultaneous subexcitation coincide with the characteristics of the radiation ascribed earlier to core-valence transitions. The photostimulated variation of the absorption spectra of autolocalized excitons is accompanied by selective variation of the luminescence spectra of autolocalized excitons, which also is evidence of their complex spectral content.

Язык оригиналаАнглийский
Страницы (с-по)837-838
Число страниц2
ЖурналTechnical Physics Letters
Том23
Номер выпуска11
СостояниеОпубликовано - ноя 1997

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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