类锂等电子系列高位三激发态2p2np4So能量和到1s2pmp4P态的辐射跃迁

利用多组态相互作用方法及Rayleigh-Ritz变分法,计算了类锂离子2p2np4So(n=2-4)和1s2pmp4P(m=2,3)的能量.运用截断变分方法得到能量的改进量.计算了相对论修正、质量极化效应,从而获得了高精度的能量计算值.同时还计算了该系统之间的辐射跃迁波长、振子强度和辐射跃迁率.计算结果与实验符合得很好.     

类镍金离子的双电子复合速率系数

 在自旋轨道劈裂阵模型下, 理论计算在0.02keV≤T≤10keV范围内,类镍金Au⁵¹⁺的3d⁹nln''l''(n''=4,5,6; l''=s,p,d,f)双电子复合速率系数,并分析了影响双电子复合速率系数的主要因素。     

用冲击波测量黑腔辐射温度的新方法

 用解析方法和数值模拟方法研究了用冲击波测量黑腔辐射温度的可能性及其可能达到的精度。结果表明, 通过精确测量镶嵌于黑腔靶侧面中间的Al楔形靶中冲击波的传播速度和压力的变化来推断黑腔的辐射温度随时间的变化是一种可行的方法, 而且可以大幅度地提高辐射温度的测量精度。     

Enhancement of electron–ion recombination rates at low energy range in the heavy ion storage ring CSRm

Recombination of Ar¹⁴⁺, Ar¹⁵⁺, Ca¹⁶⁺, and Ni¹⁹⁺ ions with electrons has been investigated at low energy range based on the merged-beam method at the main cooler storage ring CSRm in the Institute of Modern Physics, Lanzhou,China. For each ion, the absolute recombination rate coefficients have been measured with electron–ion collision energies from 0 meV to 1000 meV which include the radiative recombination(RR) and also dielectronic recombination(DR)processes. In order to interpret the measured results, RR cross sections were obtained from a modified version of the semiclassical Bethe and Salpeter formula for hydrogenic ions. DR cross sections were calculated by a relativistic configuration interaction method using the flexible atomic code(FAC) and AUTOSTRUCTURE code in this energy range. The calculated RR + DR rate coefficients show a good agreement with the measured value at the collision energy above 100 meV.However, large discrepancies have been found at low energy range especially below 10 meV, and the experimental results show a strong enhancement relative to the theoretical RR rate coefficients. For the electron–ion collision energy below 1 meV, it was found that the experimentally observed recombination rates are higher than the theoretically predicted and fitted rates by a factor of 1.5 to 3.9. The strong dependence of RR rate coefficient enhancement on the charge state of the ions has been found with the scaling rule of q^3.0, reproducing the low-energy recombination enhancement effects found in other previous experiments.     

撒哈拉银蚁仿生结构在光伏组件冷却中的应用

对当前晶硅太阳电池的太阳吸收特性进行了太阳光谱分析, 并在此基础上提出一种基于撒哈拉银蚁仿生结构的热管理方法, 该仿生结构由氧化物-金属-氧化物Oxide-metal-oxide(OMO)和表面具有微纳结构的聚二甲基硅氧烷Polydimethylsiloxane(PDMS)薄膜共同组成, 可通过热辐射进行表面散热, 同时也能显著地反射近红外波段的太阳光, 进一步降低表面温度. 理论计算结果表明, 将该冷却器应用于光伏组件可使电池温度降低约7.2K. 研究结果为光伏组件的热管理提供了一种新方法.     

Stepwise solution to an inverse problem for the radiative transfer equation as applied to tomography

An X-ray tomography problem is formulated and analyzed within the framework of a mathematical model based on the polychromatic stationary radiative transfer equation with no collision integral. It is assumed that the outgoing radiation density is only given, and the task is to find the surface of an internal inclusion on whose boundary the coefficients of the equation may have jump discontinuities. The uniqueness of the solution is proved, and the corresponding solution algorithm is outlined. A feature of this work is that the research technique is local in character. This makes it possible to use only some of the available data, and the procedure can be stopped at an intermediate stage of the reconstruction, which can be useful in applications.     

Mg 3sns 1~S_0 Rydberg态的能级和寿命

利用多通道量子数亏损理论对最近发表的Mg 3sns'S_0 Rydberg态之能级位置进行了研究.结果不仅证实了已测得的数据,还预言了尚未测量的较高的能级.利用同一组参数计算了一部分能级的自然辐射寿命,其结果也与相应的实验结果相一致.     

各向异性光子晶体中Λ型原子的自发辐射性质

讨论了各向异性光子晶体中Λ型三能级原子的辐射性质. 研究发现，原子上能级与光子晶体带边的相对位置和两低能级相对位置将直接影响原子的动力学性质及其周围辐射场的性质. 通过数值计算和理论分析，得到了光子晶体中原子周围辐射场在不同位置随时间演化的图像，并讨论了光子晶体对原子辐射谱的影响.     

Sc^18＋和Ti^19＋的辐射跃迁几率

计算表明,Sc~(18+)和Ti~(19+)的5f—3d和5d—3p跃迁波长处于水窗当中.进而,详尽地计算了这两个元素类锂离子的精细能级(n≤12,l≤5)及它们间的辐射跃迁几率.