用正电子湮没寿命谱学法研究BBO单晶缺陷

The research for defects of the BBO crystal by means of the positron annihilation lifetime spectroscopt

低温相偏硼酸钡(BBO)单晶是一种新型的非线性光学晶体。本文用正电子湮没寿命谱学法首次研究了它的缺陷,分析了它的缺陷类型及其成因。为克服缺陷、生长高质量的晶体提供科学依据。

The b ium metaborete crystal in low temperature phase is a new nonlinear optical material.In this paper,the measuring resul- ts of crystal defects by means of the positron annihilation lifeti me spectroscopy are reported,the kind of defects and the formation mech- anism are analysed and the study provides scientific basis for over-co ming defects and growing high quality crystals.