Spectroscopy and Spectral Analysis, Volume. 31, Issue 8, 2141(2011)
Comparisons of Spectral Properties of CsI∶Tl Crystals with Various Tl+-Doped Concentrations
Absorption Spectra and Photoluminescence (PL) spectra of CsI∶Tl crystals with various Tl+-concentrations were measured for absorption and luminescent research in CsI∶Tl. Their UV absorption spectra contained three peaks at 297, 273 and 247 nm. The experiments were demonstrated that the peaks in the high Tl+-concentration CsI∶Tl crystals are broader than ones in the low Tl+-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 Tl+-concentration CsI∶Tl lead to the changes in absorption or fluorescence excitation peaks, but no changes in the fluorescence band widths and locations at room temperature.
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WU Zheng-long. Comparisons of Spectral Properties of CsI∶Tl Crystals with Various Tl+-Doped Concentrations[J]. Spectroscopy and Spectral Analysis, 2011, 31(8): 2141
Received: Oct. 24, 2010
Accepted: --
Published Online: Aug. 29, 2011
The Author Email: Zheng-long WU (wuzl@bnu.edu.cn)