Excitation spectra of activator luminescence—the observation of a new D absorption band in KBr:In crystals
作者:
I. Plavina,
A.I. Popov,
期刊:
Radiation Effects and Defects in Solids
(Taylor Available online 1994)
卷期:
Volume 128,
issue 1-2
页码: 27-33
ISSN:1042-0150
年代: 1994
DOI:10.1080/10420159408218853
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We have investigated excitation spectra of the In+ion luminescence directly excited by UV-light (6.1 to 6.4 eV) and creation spectra of the photostimulated luminescence, excited by F-band light after a preliminary monochromatic UV irradiation of KBr:In crystals with different In+concentrations. Careful analysis of the excitation spectra allows us to detect a new D absorption band having a Gaussian shape with the following parameters: peak position at E0= 6.375 eV and half-width ΔE = 0.14 eV, effective absorption cross-section at the band peak [sgrave]D, max= 6.9 10−16cm2. The oscillator strength f = 0.12 of the D band and quantum yield η = 0.012 ± 0.001 of In+luminescence excited in the D band are also determined.
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