title: [Comparisons of spectral properties of CsI:T1 crystals with various Tl(+)-doped concentrations].
abstract: Absorption Spectra and Photoluminescence (PL) spectra of CsI: T1 crystals with various T1+-concentrations were measured for absorption and luminescent research in CsI: T1. Their UV absorption spectra contained three peaks at 297, 273 and 247 nm. The experiments were demonstrated that the peaks in the high T(1+)-concentration CsI: T1 crystals are broader than ones in the low T(1+)-concentration crystals and their absorption A-peak shift by 20 nm, but their PL with UV excitations are similar. It was suggested that lattice distortions in the high T1+-concentration CsI: T1 lead to the changes in absorption or fluorescence excitation peaks, but no changes in the fluorescence band widths and locations at room temperature.
authors: Analytical and Testing Center, Beijing Normal University, Beijing 100875, China. wuzl@bnu.edu.cn
authors: Zheng-Long
authors: ZL
authors: Wu