X光背光观测烧蚀面扰动引起内界面扰动的增长

 侧向背光照相能直接反映靶表面扰动幅度的变化情况。在神光Ⅱ装置上，实验利用侧向背光照相技术，对烧蚀面扰动引起的内界面扰动增长进行了观测。实验结果表明，观察到的内界面扰动幅度大于期望值。分析认为，造成内界面较大扰动增长的原因主要是2维效应。X光辐照的主要是烧蚀面的中间部分，烧蚀面扰动引起的内界面的扰动就呈现出一幅从中间的扰动区域逐渐过渡到四周的图像。由此，提出了新的靶优化设计方案，应尽可能减小沿背光方向的样品尺寸。     

类镍等电子系列离子M1,M2,E2禁戒跃迁特性的理论研究

利用基于全相对论框架下的多组态Dirac-Fock理论方法发展起来的程序包GRASP92和新发展的处理辐射跃迁过程的程序REOS99，计算了类镍等电子系列离子(Z=45—95)的基组态3s²3p⁶3d¹⁰¹S₀以及低激发组态3s²3p⁶3d⁹4l,3s²3p⁵3d¹⁰4l和3s3p⁶3d¹⁰4l(l=s,p,d,f)的能级及其向基态的M1,M2,E2禁戒跃迁概率.通过分析高离化类镍离子在特定的原子序数范围内由于存在能级交叉而产生的强组态相互作用，解释了高离化类镍离子禁戒跃迁概率的反常变化现象，探讨了禁戒跃迁概率受强组态相互作用影响而变化的一般规律.     

关于低温辐射平均自由程的一些讨论

使用细致组态/不可分辨跃迁系模型计算了不同的温度、密度下金等离子体的辐射平均自由程,注意到了一个普遍存在的理论现象--低温区鼓包现象,并从光子的分频自由程和权重函数两个方面探讨了该现象形成的物理机制.     

Relativistic Distorted-Wave Calculations of Electron Impact Excitation Cross Sections of Be-Like C2＋ Ions

A fully relativistic distorted-wave program is developed based on the Grasp92 and Ratip packages to calculate electron impact excitation （EIE） cross sections. As a first application of the program, the EIE cross sections of Be-like C^α＋ ions from the metastable 1s^22s2p^3 p to 1s^22p^2 ^3 p excitation and the inner-shell excitations are calculated systematically. Meanwhile, the correlation effects of target states are discussed. It is found that the correlation effects play an important role in the low energy EIE cross sections. An excellent agreement is found when the results are compared with previous calculations and recent measurements.     

Polarization of Radiation Emitted after Electron Impact Excitation

A programme is developed to calculate the polarizations of the radiation emitted after electron impact excitation. The fully relativistic distorted-wave method is used in cross-section calculations. The programme is applied to He- and Li-like ions. The calculated values of line polarization are compared with other theoretical results and experimental values. For He-like U, at lower incident energy, the present polarization agrees with the other theoretical ones within 1%, while at higher energy, the differences increase up to about 10%. For He-like Fe and Ti, the present results of polarization degree for most of the lines agree with the experimental data within the experimental error bars. For the Li-like Ti line q （ls2s2p^2p3/2 to ls^22s）, the present value of the polarization agree excellently with another theoretical one, and both the values are consistent with the measured data within the experimental error bar.     

类镍钆(Gd36+)离子的双电子复合系数研究

 在自旋轨道劈裂阵模型下,通过类铜组态理论计算出类镍Gd³⁶⁺的双电子复合速率系数,得出其在电子温度 0.02~5keV 范围内的变化规律,并分析了影响双电子复合速率系数的主要因素是相应的自电离系数和离化势,这为等离子体的诊断提供了一种新的方法。     

THEORETICAL CALCULATION OF THE RELATIVISTIC SUBCONFIGURATION-AVERAGED TRANSITION ENERGIES

A method for calculating the average energies of relativistic subconfigurations in highly ionized heavy atoms has been developed in the framework of the multiconfigurational Dirac－Fock theory. The method is then used to calculate the average transition energies of the spin-orbit-split 3d－4p transition of Co-like tungsten, the 3d－5f transition of Cu-like tantalum, and the 3d－5f transitions of Cu-like and Zn-like gold samples. The calculated results are in good agreement with those calculated with the relativistic parametric potential method and also with the experimental results.     

软X射线全息平焦场光栅的条纹弯曲现象及其对光谱分辨率的影响

软X射线平焦场光栅光谱仪是等离子体诊断的重要仪器,其核心光学元件全息平焦场光栅通常采用非球面波记录光路制作,因此光栅条纹存在弯曲的现象.光栅条纹的弯曲会影响光谱成像质量,从而影响系统的光谱分辨率.记录光路的优化,只保证光栅子午面的线密度分布,因此优化的记录光路并不是惟一的,所以在保证子午面的线密度分布的同时能制作具有不同弯曲程度条纹的光栅.针对应用于0.8—6 nm的全息平焦场光栅,利用光线追迹方法分析了不同弯曲程度条纹光栅的光谱成像,发现采用柱面反射镜制作的接近于直条纹的光栅具有较好的光谱成像质量.相对于弯曲条纹的光栅,接近于直条纹的光栅理论光谱分辨率有明显的提高,入射波长为3 nm时,光谱分辨率从626提升到953,入射波长为5 nm时,光谱分辨率从635提高到1222.     

高Z元素类镍离子谱研究

用ＰＥＴ平晶谱仪测量了Ｈｆ,Ｔａ，Ｗ和Ｒｅ激光等离子体发射波长范围为５－８?的软Ｘ射线谱，重点研究了其类镍离子谱线，精确测量和准确辨认出四种高Ｚ元素的３７条ｎ＝３－４的类镍离子共振跃迁线和内壳层跃迁线。整个测量范围内谱线精确波长值的绝对误差小于０．００５?．与ＭＣＤＦ方法和ＨＦＲ方法得到的理论计算结果比较，两者符合相当好。 关键词：     

重粒子碰撞过程理论研究

应用全量子的分子轨道强耦合方法和经典径迹蒙特卡罗方法计算从低能到高能的离子与原子和分子碰撞反应截面和速率系数.在分子轨道强耦合计算中,采用从头计算法得到的绝热分子势能面和径向、转动耦合矩阵元,经过幺正变换后,求解强耦合方程组.本文以Si3+离子与氢原子碰撞过程为例,计算了重粒子碰撞过程中发生的电荷转移、碰撞电离和碰撞激发截面和速率系数,并与现存的理论结果和实验测量进行了对比.