%0 Journal Article
%T Intrinsic and radiation-induced colour centers in PbWO4 crystal<br>钨酸铅晶体的本征色心和辐照诱导色心
%A Feng Xi-Qi
%A Lin Qi-Sheng
%A Man Zhen-Yong
%A Liao Jin-Ying
%A Hu Guan-Qin
%A <br>冯锡淇
%A 林奇生
%A 满振勇
%A 廖晶莹
%A 胡关钦
%J 物理学报
%D 2002
%I 
%X Based on the defect chemistry and crystal structures of PbWO 4 (PWO) crystal,the microstructure of PWO crystal after high-temperature annealing was studied by optical absorption spectra,extended X-ray absorption fine structure (EXAFS) and refined X-ray diffraction (XRD) technigues.The variation of defect concentration before and after annealing has been observed.Accordingly,we proposed that the origin of the intrinsic 350nm absorption band in as-grown crystals was ascribed to the V - F hole centers.The intensity of the absorption band of colour centers in the ultraviolet region was found to be dependent on the concentration difference of the Pb and O vacancies:V Pb]-V O].Also,we suggested that the 420nm absorption band originates from the V 0 F dihole centers,based on the experimental results of formation of radiation-induced colour centers and their polarized absorption spectra.The feasibility of the proposed model of colour centers was also discussed.
%K PbWO
%K 4
%K intrinsic colour center
%K radiation-induced color center
%K color center model<br>钨酸铅
%K 本征色心
%K 辐照诱导色心
%K 色心模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=77FB9925627DCC58&yid=C3ACC247184A22C1&vid=987EDA49D8A7A635&iid=0B39A22176CE99FB&sid=0C3F9E980968AF79&eid=4AD4BA66429F5627&journal_id=1000-3290&journal_name=物理学报&referenced_num=5&reference_num=20