Precise measurements of high-voltage pulses by using electro-optical effect

A novel method of more precise measurements of high-voltage pulses has been proposed using a linear electro-optical effect. The increase in measurement precision has been obtained using multiple passes of a laser beam through a noncentrosymmetric nonlinear optics single crystal of good optical quality whilst applying a nonhomogeneous electric field. Different crystalline materials, showing appropriate values of electrooptical coefficients r_ijlo have been found to be applicable for highly precise measurements of the high-voltage pulses. The maximum amplitude of the high-voltage pulses can reach 20 MV, ensuring an accuracy of about 0.2 V (i.e. 10⁻⁸ of the measured value). The pulse duration of about 10⁻¹⁰ s can be registered. All these advantages of the presented method provide a powerful tool for technologists and metrology physicists.     

相对论平均场理论对Pb同位素位移的研究

运用变形的相对论平均场理论研究了Pb同位素链的基态性质. 对关联的处理采用了BCS方法, 不成对核子的处理运用了“阻塞”法. 计算的结果很好地符合了实验上Pb的平均结合能, 中子分离能, 同位素位移. 接着从原子核的微观结构出发, 比较详细地研究了Pb链同位素位移出现反常扭折这一重要性质的物理机制.