高离化类铍离子2s2 1S0-2s2p3P1(Z=10-103)自旋禁戒光谱跃迁

利用全相对论性多组态Dirac Fock平均能级 (MCDF AL)方法系统地计算了高离化类铍离子自旋禁戒 2s21S0 — 2s2 p3 P1(Z =10— 10 3)跃迁的能级间隔和跃迁概率 ,计算中考虑了重要的核的有限体积效应 ,Breit修正和QED修正 ,所得结果和最近的实验数据及理论计算值进行了比较 ,结果表明 :高原子序数的高荷电离子的自旋禁戒跃迁的跃迁概率和中性原子的电偶极E1的相当 ,在ICF和MCF高温激光等离子体中 ,自旋禁戒跃迁概率过程不容被忽视 .     

高离化离子Bi^54＋的能级结构和跃迁参数的理论计算

根据相对论多组态理论，采用新版“多功能相对论原子结构计算程序”ＧＲＡＳＰ２（１９９２），计算了高离化离子Ｂｉ~（５４＋）的精细结构能级和光谱跃迁参数。计算得到的波长与实验值和Ｓｅｅｌｙ等人的计算结果进行了比较。     

高离化态类镍离子电子碰撞激发过程的相对论扭曲波理论研究

利用相对论扭曲波方法和新发展的研究电子碰撞激发过程的计算程序REIE06,系统计算了电子碰撞激发高离化态类镍Gd³⁶⁺和Rn⁵⁸⁺—U⁶⁴⁺(Z=86—92)离子从基态到4l(l=s,p,d,f)次壳层精细结构能级的碰撞强度和截面.研究了随等电子系列变化时,从基态到与X射线激光有关的3d⁹4p和3d⁹4d激发态能级的电子碰撞激发截面随Z的变化,讨论了强的组态相互作用对高离化态类镍离子截面的影响.通过对Gd³⁶⁺离子涉及X射线激光跃迁的相关能级电子碰撞激发速率系数的计算,分析了等离子体中电子温度对碰撞过程的影响.同时,目前部分计算结果与以往的理论结果进行了比较,得到了很好的一致性. 关键词： 电子碰撞激发 相对论扭曲波方法 高离化态类镍离子     

高离化态类Ne离子的与X射线激光有关的3p-3s跃迁的理论研究

利用多组态Dirac-Fock(MCDF)理论方法,系统研究了与X射线激光有关的类Ne等电子系列离子(Z=50～57)的2s22p6、2s22p53e和2s2p63e(e=s、p、d)激发态的能级以及跃迁几率、波长和振子强度.详细讨论了关联效应对与X射线激光有关的能级寿命以及跃迁几率的影响,给出并分析了与x射线激光有关的3p-3s跃迁的波长,几率和振子强度的变化规律,部分计算结果与已有的理论和实验结果作了比较.     

高离化态氙离子3d-4f跃迁产生的X射线谱的理论研究

利用多组态Dirac-Fock (MCDF) 理论方法系统研究了Xe24+-Xe27+离子的3d-4f跃迁谱的结构,很好的重现了近来在短脉冲强激光照射氙原子团簇过程中产生的1.25～1.55 nm波长范围内的半连续X射线谱峰,并且揭示了半连续谱峰的形成机理是由于旁观电子的存在.     

高离化态离子及其光电离过程基本特征的理论研究

在Dirac-Slater相对论理论框架下,研究了HCI(高离化态离子)的基本性质及其光电离过程的基本特征.通常HCI的电场非常强,其电子波函数沿靠近核的径向空间被压缩,这极大地改变了相应的物质的性质,使HCI的光电离过程与一般的原子(离子)的相比较有很大的不同:原子核的尺寸效应和相对论效应变得更加重要,而多极效应对光电离截面的影响却趋于减弱.     

高离化态离子及其光电离过程基本特征的理论研究

在Dirac-Slater相对论理论框架下,研究了HCI（高离化态离子）的基本性质及其光电离过程的基本特征. 通常HCI的电场非常强,其电子波函数沿靠近核的径向空间被压缩,这极大地改变了相应的物质的性质,使HCI的光电离过程与一般的原子（离子）的相比较有很大的不同：原子核的尺寸效应和相对论效应变得更加重要,而多极效应对光电离截面的影响却趋于减弱.     

原子核的有限体积效应对高离化态离子能级和波函数的影响

在相对论理论框架下,分别在点电荷和两参数Fermi核模型近似下计算了高离化态类氢离子（Z=80—112）n=1—3壳层的波函数和能级. 分析了核有限体积效应对它们的影响. 在此基础上,给出了核有限体积效应对原子能级的修正公式. 同时,还进一步讨论了相对论效应和核有限体积效应之间的相互影响,发现对高Z元素相对论效应与核有限体积效应之间有很强的耦合. 关键词： 原子核有限体积效应 高离化态离子 相对论效应     

类钴pd19+离子3p63d9-3p53d10,3p63d9-3p63d84p跃迁的理论计算

用多组态自洽场方法,结合我们提出的半经验拟合公式,计算了高离化态类钴3p63d9-3p53d10,3p63d9-3p63d84p跃迁和振子强度,并与实验符合得较好.     

CuⅠ-AsⅤ离子3d104s-3d94s4p跃迁组态的能级和振子强度

利用组态相互作用理论和参数拟合内插的方法计算了类铜ＣｕⅠ－ＡｓⅤ离子３ｄ１０４ｓ－３ｄ９４ｓ４ｐ跃迁组态的能级、谱线波长和电偶极跃迁的振子强度。３ｄ９４ｓ４ｐ组态能级的所有计算结果与现有实验数据符合得很好。而ＺｎⅡ和ＧａⅢ离子的大部分能级纯属预测计算结果。给出了３ｄ１０４ｓ－３ｄ９４ｓ４ｐ能级跃迁的谱线波长和振子强度。     

Testing of QED-Theory and Precise Measurements of the Rydberg Series for the He-Like Multicharged Ions

The wavelengths of the 1snp ¹ P ₁−1s ^{2 1} S ₀ transitions in He-like Mg XI, F VIII (n= 4–8) and Al XII (n=6,9) have been calculated in the framework of the 1/Z expansion method including relativistic effects and QED contributions. It is found that QED corrections to the ground-state ionization energy are significant at the present level of experimental accuracy. This revised version was published online in July 2006 with corrections to the Cover Date.     

Effects of Ions Charge-Mass Ratio on Energy and Energy Spread of Accelerated Ions in Laser Driven Plasma

Effects of ions charge-mass ratio on energy and energy spread of accelerated ions in laser driven plasma are investigated in detail by proposing a simple double-layer model for a foil target driven by an ultrastrong laser. The radiation pressure acceleration mechanism plays an important role on the studied problem. For the ions near the plasma mirror, i.e. electrons layer, the dependence of ions energy on their charge-mass ratio is derived theoretically. It is found that the larger the charge-mass ratio is, the higher the accelerated ions energy gets. For those ions far away from the layer, the dependence of energy and energy spread on ions charge-mass ratio are also obtained by numerical performance. It exhibits that, as ions charge-mass ratio increases, not only the accelerated ions energy but also the energy spread will become large.     

二价硅离子高于3s3p态能级间自旋允许跃迁的理论计算

在最弱受约束电子势模型理论中，电子被分成最弱受约束电子和非最弱受约束电子，而假定最弱受约束电子在核和非最弱受约束电子形成的势场中运动，这样许多多电子体系的问题可以简化成最弱受约束电子的单电子问题来解决．最弱受约束电子势模型理论已经被成功地应用于跃迁几率，振子强度和原子能级的计算．应用一组方程计算了Si III的离子自旋允许跃迁的跃迁几率，计算结果与标准值比较是相当令人满意的，误差均在15%以下．而且表明最弱受约束电子势模型理论可以非常简便并准确地应用于计算高激发态间的跃迁几率．     

共轭聚合物中的量子限制效应和能量传递

在共混的两种共轭聚合物中,采用分子自级装技术制备了嵌段共轭聚合物量子线的异质结构,通过室温下吸收光谱、发光光谱和激姨光谱的研究证实了在这种嵌段共轭聚合物量子线的异质结构中存在很强的激子限制效应以及链内和链间的有效能量传递。     

New Classified Lines and Energy Levels in the Ne IV Spectrum

The spectrum of triply ionized neon, Ne IV, emitted by pulsed light sources has been studied. Ninety‐three new classified lines are reported, and the wavelengths of 99 previously observed and classified lines are improved. Using these data, it was also possible to determine 7 new energy levels and to adjust the value for 32 previously reported levels.     

Radiationless Energy Transfer Between Rare-Earth Ions in Solutions and its Application to the Investigation of Complexation Processes

Radiationless energy transfer between rare-earth ions (Ln³⁺) in solutions has some features: 1) the electronic transitions in Ln³⁺ complexes causing the luminescence of energy donor and the absorption of energy acceptors are forbidden by Laporte's rule and are weakly intensive. Therefore the critical radius (R_o) of energy transfer between the rare-earth ions for dipole-dipole mechanism is close to that for exchange-resonant mechanism. This fact presents difficulties for unequivocal interpretation of the energy transfer mechanism. 2) The plus-three lanthanide ions exist in solution as a set of complexes with different number of charged ligands in the inner coordination sphere and hence with different total charge of complexes.     

Lamb shift in muonic hydrogen—II. Analysis of the discrepancy of theory and experiment

Currently, both the g factor measurement of the muon as well as the Lamb shift 2S–2P measurement in muonic hydrogen are in disagreement with theory. Here, we investigate possible theoretical explanations, including proton structure effects and small modifications of the vacuum polarization potential. In particular, we investigate a conceivable small modification of the spectral function of vacuum polarization in between the electron and muon energy scales due to a virtual millicharged particle and due to an unstable vector boson originating from a hidden sector of an extended standard model. We find that a virtual millicharged particle which could explain the muonic Lamb shift discrepancy alters theoretical predictions for the muon anomalous magnetic moment by many standard deviations and therefore is in conflict with experiment. Also, we find no parameterizations of an unstable virtual vector boson which could simultaneously explain both “muonic” discrepancies without significantly altering theoretical predictions for electronic hydrogen, where theory and experiment currently are in excellent agreement. A process-dependent correction involving electron screening is evaluated to have the right sign and order-of-magnitude to explain the observed effect in muonic hydrogen. Additional experimental evidence from light muonic atoms and ions is needed in order to reach further clarification.     

Theory of the polarization of highly charged ions in storage rings: Production, preservation, observation and application to the search for a violation of the fundamental symmetries

Theoretical concepts for the production, preservation and control of polarized highly charged ion beams in storage rings are investigated. It is argued that hydrogen-like ions can be polarized efficiently by optical pumping of the Zeeman sublevels of ground state hyperfine levels and that the maximum achievable nuclear polarization exceeds 90%. In order to study the preservation of the polarization during the ion motion through the magnetic system of the ring, the concept of the instantaneous quantization axis is introduced. It is suggested that the employment of “Siberian snakes” may help to preserve the ion beam polarization in the ring. The control of the beam polarization can be achieved by different methods: by measuring the Stokes parameters for the emitted photons or by observing the angular dependence of the transition rates for polarized ions. The important motivation for the production of polarized ion beams is the possibility to observe parity nonconservation effects in the hyperfine-quenched transitions in helium-like highly charged ions, where these effects can reach an unprecedented high value for atomic physics. The possible observation of parity nonconservation effects connected with the nuclear anapole moment is also discussed. A method for the observation of the electric dipole moment of an electron in a storage ring with a polarized highly charged ion beam is proposed. This method allows, in principle, to improve the existing boundaries for the electric dipole moment of an electron. However, the requirements of the corresponding experiment are very stringent.