类锂“洞原子”2s2s2p2P0和2s2p2p2D三激发共振系列的能量、精细结构和寿命

采用多通道鞍点和鞍点复数转动方法，计算了类锂离子(Z=3—10)2s2s2p²P⁰和2s2p2p²D三激发共振态系列的能量、精细结构和寿命.Auger宽度由耦合主要的通道得到，相对论效应计算到一级微扰，质量极化效应计算到无穷级. 关键词：     

用实时全息法配合摄像机研究固体火箭推进剂的燃烧过程

本文采用实时全息法与摄像机相结合的方法来研究固体火箭推进剂的燃烧过程，记录速度为２５帧／秒，曝光快门速度最高可达１／２０００秒。成功率高，条纹清晰，对固体火箭推进剂燃烧器燃烧过程取得了有用的结果。此方法对研究快速变化过程提供了一种简易有效的手段。     

An investigation of electromagnetic wave propagation in plasma by shock tube

This paper presents the electromagnetic wave propagation characteristics in plasma and the attenuation coefficients of the microwave in terms of the parameters he, v, w, L, wb. The φ800 mm high temperature shock tube has been used to produce a uniform plasma. In order to get the attenuation of the electromagnetic wave through the plasma behind a shock wave, the microwave transmission has been used to measure the relative change of the wave power. The working frequency is f = (2-35)GHz (ω=2πf, wave length A =15cm-8mm). The electron density in the plasma is ne = (3×10^10-1×10^14) cm^-3. The collision frequency v = (1×10^8-6×10^10) Hz. The thickness of the plasma layer L = (2-80)cm. The electron circular frequency ωb=eBo/me, magnetic flux density B0 = (0-0.84)T. The experimental results show that when the plasma layer is thick (such as L/λ≥10), the correlation between the attenuation coefficients of the electromagnetic waves and the parameters ne,v,ω, L determined from the measurements are in good agreement with the theoretical predictions of electromagnetic wave propagations in the uniform infinite plasma. When the plasma layer is thin (such as when both L and A are of the same order), the theoretical results are only in a qualitative agreement with the experimental observations in the present parameter range, but the formula of the electromagnetic wave propagation theory in an uniform infinite plasma can not be used for quantitative computations of the correlation between the attenuation coefficients and the parameters ne,v,ω, L. In fact, if ω<ωp, v^2<<ω^2, the power attenuations K of the electromagnetic waves obtained from the measurements in the thin-layer plasma are much smaller than those of the theoretical predictions. On the other hand, if ω>ωp, v^2<<ω^2 (just v≈f), the measurements are much larger than the theoretical results. Also, we have measured the electromagnetic wave power attenuation value under the magnetic field and without a magnetic field. The result indicates that the value measured under the magnetic field shows a distinct improvement.     

类铍离子内壳激发态1s2p^33P^o的俄歇宽度、俄歇分支率和辐射跃迁率计算

采用鞍点变分方法和鞍点复数转动方法，井考虑相对论修正和质量极化效应，计算了类铍内壳激发态1s2p^33P^o的俄歇宽度、俄歇电子能量和俄歇分支率．同时还对1s2p^33P^o态到1s^22p3P^3P^e态（Z=4～10）的振子强度和辐射跃迁率进行了计算，计算结果和其他理论结果和实验数据符合的很好。     

类铍离子内壳激发态1s2p33Po的俄歇宽度、俄歇分支率和辐射跃迁率计算

采用鞍点变分方法和鞍点复数转动方法,并考虑相对论修正和质量极化效应,计算了类铍内壳激发态1s2p33Po的俄歇宽度、俄歇电子能量和俄歇分支率.同时还对1s2p33Po态到1s22p3p3Pe态(Z=4～10)的振子强度和辐射跃迁率进行了计算.计算结果和其他理论结果和实验数据符合的很好.     

石墨—电弧法合成巴基管生长机制的探讨

从分析石墨电弧法制取巴基管的电弧物理现象入手，详细讨论了电弧力及高速离子流在合成巴基管时的作用，指出在制取巴基管的理想条件的电弧过程中，电极的消耗以Ｃｎ为主，以Ｃ２的消耗为辅，并由此提出了巴基管由Ｃｎ的侧向连接，卷曲生长的长大机制。     

机载双站SAR波束指向误差研究

本文基于双站SAR的运动几何结构，建立了机载双站SAR波束指向误差模型，研究了指向误差所引起的回波能量分布的变化，及其带来的多普勒中心频率估计偏差，以及波束指向同步要求的限制条件，分析了它们对成像结果的影响，最后，仿真结果验证了上述分析的有效性．