Abstract
Abstract 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 10−16 cm2. 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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