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用改进的垂直坩埚下降法成功地生长了高质量的钨酸铅晶体,晶体毛坯的尺寸为28min×28mm×360mm;晶体的生长工艺参数为:籽晶取向[001];下降速度 0.6~1.0mm/h;生长界面附近的温度梯度为20~30℃/cm,加工后的晶体成品在420nm附近的透过率>60%;在360nm附近的透过率>25%.晶体的光输出>9p.e/MeV;光伤<5%.

High-quality lead tungstate (PWO) single crystals were successfully grown by a modi- fied vertical Bridgman method. The optimal growth parameters selected are as follows: seed crys- tal direction <001 >, lowering rate 0.6~1mm/h, the axial temperature gradient 20-30℃/cm at growth solid-melt boundary. The performances of PWO crystals obtained are as follows: optical transmittance more than 60% at 420nm and more than 25% at 360nm, light yield more than 9 p.e./MeV, light loss less than 5% after irradiation.

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