中文摘要：

用提拉法生长了Lu2Si2O7：Ce晶体，对该晶体的闪烁性能进行了研究。透射光谱表明，Lu2Si2O7：Ce晶体的吸收边比Lu2SiO5：Ce晶体向短波方向移动了25nm，使透光范围进一步拓宽。X射线发射光谱和UV激发发射光谱均具有典型的双峰特征，主峰在378nm。UV激发发射谱具有温度效应，即375K以上时，发光效率迅速降低；425K以上时，发光主峰位明显红移。衰减曲线符合单指数式衰减规律，常温下经UV激发后的衰减时间约为34ns。从曲线形态看，375K以下的衰减谱与室温下的几乎完全相同，拟合的结果在32．8～34ns之间；衰减时间的温度效应从375K开始显现，即随温度的升高，衰减时间有加速变短的趋势，到500K时缩短为6．72ns。热释光谱在488，553K处有两个热释光峰，但室温附近几乎观察不到热释光峰。

英文摘要：

Lu2Si2O7： Ce crystal is a recently discovered inorganic scintillator. It is suitable for applications such as PET or oil well logging. Transparent and crackless LPS： Ce crystals have been grown by using the Czochralski method in our lab. We have characterized the scintillation properties of cerium doped lutetium pyrosilicate and discussed its luminescent mechanism. A lot of work has been done on the temperature dependence of the emission spectra under UV excitation and the temperature dependence of the fluorescence lifetimes using a Edinburgh-920 luminescence spectrometer, which will help us to find the optimal working temperature for this crystal. Transmission spectra shows that the absorption cut-off edge of LPS： Ce crystal is 25 nm shorter than LSO ： Ce crystal, which widens the transmission range. X-ray induced emission spectra are characteristic of two peaks and the main peak locates at 378 nm, which are consistent with the emission spectra under UV excitation. The temperature dependence of the emission spectra under UV excitation shows two features, the first is luminescence efficiency decreasing strongly when the temperature beyond 375 K, and the second is peak site red shifting when the temperature beyond 425 K. Decay curve follows the single exponential decay law. The decay time is about 34 ns at room temperature under UV excitation. Based on the shapes of the decay curves, two distinct trends are identified. First, below 375 K, the curves are similar to that obtained at room temperature, and the fitting results vary from 32.8 ns to 34 ns. There is a little difference, but it is stable on the whole. In this range, the decay time slightly increases with temperature. Second, beyond 375 K, temperature dependence of the fluorescence lifetimes becomes evident, for example, with the increases of the temperature, the decay time strongly decreases. The decay time shorten to 6.72 ns at 500 K. Luminescence efficiency seems connected to decay time, and they change towards the same direction. Two peaks can