氧分子的价壳层光学振子强度研究

在入射电子能量为1500eV、平均散射角为0°、能量分辨为60meV条件下，得到了氧分子在5.7—28.5eV能量区间的光学振子强度密度谱，获得了氧分子E³Σ^-_ｕ的ν′=0，1，2和2³Π_ｕ的ν′=0，1各振动能级的绝对光学振子强度，同时检验了我们的Bethe-Born转换因子外推到低能端的可靠性．将所得结果与前人的工作进行了比     

单电离态Kr原子强跃迁能级振子强度的研究

阐述了用束-箔方法通过测量单电离态Kr原子强跃迁谱线的能级寿命来 确定振子强度f-值的方法,并对确定出的强跃迁谱线的能级吸收振子强度进行简要讨 论。     

氪原子价壳层的广义振子强度研究

在入射电子能量2.5 keV、角度1°- 8°条件下测量了氪的价壳层偶极允许跃迁4p6(1S0) → 4p55s[3/2]1, 4p55s′[1/2]1, 以及偶极禁戒跃迁4p6(1S0) → 4p55p的绝对广义振子强度, 并与前人的实验和理论结果进行了比较.     

Eu原子4f~76p_(3/2)6d自电离过程的动力学特性

采用孤立实激发技术(isolated-core excitation, ICE)及速度影像技术(velocity-map imaging,VMI),研究了Eu原子4f~76p_(3/2)6d自电离过程的动力学特性.孤立实激发技术用于将Eu原子从基态4f~76s~(2 8)S_(7/2)经中间态4f~76s6p激发到4f~76s6d里德堡态,然后将其进一步激发至4f~76p_(3/2)6d自电离态;速度影像技术用于探测其自电离过程的动力学特性,从而获得自电离衰变的分支比(branch ratio, BR)和弹射电子的角分布(angular distribution, AD).自电离衰变的分支比代表离子的能量分布,从中获得VMI影像的径向信息;而通过各向异性参数描述的弹射电子的角分布揭示了VMI影像的角向信息.此外,讨论了自电离衰变分支比和弹射电子角分布在整个自电离共振能域内的变化情况.基于4f~76s~+和4f~75d~+两个离子态的分支比,讨论了实现Eu离子粒子数反转的可能性.     

氢分子分立区和连续区(11.0—19.0 eV)的光学振子强度研究

利用通道规律,并考虑了转动分布对跃迁峰型的影响,对测量得到的绝对氢分子光吸收谱进行了分析．文中逐个确定了11.0—15.0 eV各振动态的振子强度,并得到了B′¹Σ⁺_u的解离强度．同时,利用多重散射Xα自洽场方法计算了氢分子分立区和连续区（11.0—19.0 eV）的光吸收谱．通过计算值和实验绝对测量值的比较可以说明,在自洽层次,文中理论计算值已能较好地说明本实验. 关键词：     

Eu原子4f~76p_(3/2)ns自电离衰变分支比和弹射电子角分布

首先运用孤立实激发技术将Eu原子从基态4f~76s~(28)S_(7/2)经中间态4f~76s6p共振激发到4f~76sns Rydberg态,然后再将其进一步激发至4f~76p_(3/2)ns(n=7,8)自电离态.其次,采用速度影像技术对Eu原子自电离弹射出的电子进行探测,以便来研究自电离衰变分支比和弹射电子角分布.在研究自电离衰变分支比时,重点讨论了粒子数反转的可能性,并依据此现象可为实现自电离激光器提供有价值的信息.另外,还探讨了各向异性参数对弹射电子角分布的影响;以及在Eu原子不同自电离几率位置处,讨论了弹射电子角分布形状的变化情况.     

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。     

Cs Ⅳ离子4d内壳层激发态衰变过程的相对论理论研究

在相对论多组态Dirac-Fock理论方法基础上,通过系统考 虑电子关联效应和由于内壳层电子激发而导致的电子自旋-轨道波函数的弛豫效应,详细研究了Cs Ⅳ离子的4d内壳层电子激发组态4d95s25p5、辐射末态4d105s25p4及Auger末态4d105s25p3和4d105s15p4的能级结构及各种可能的辐射和Auger衰变过程.获得了与已有的实验结果和相关的半经 验准相对论组态相互作用计算结果相符的辐射跃迁能、振子强度以及线宽,预言了4d95s25p5态的以Auger衰变为主的 Auger电子谱的特 关键词： 内壳层激发态 辐射衰变 Auger衰变     

RbⅧ-NbⅫ离子n＝4 complex跃迁谱线、波长和振子强度

用HXR方法计算了类锌等电子序列RbⅧ-NbⅫ离子n＝4 complex组态能级.通过对各能级值沿等电子序列的变化规律分析,找出了ΔE随Zc变化的一种新的拟合公式,运用此公式和我们自己设计的FORTRAN程序对上述组态各能级值进行了系统的拟合计算.给出了4s2-4s4p,4s4p-4s4d跃迁谱线波长和相应的振子强度.     

Double Auger decay of A 3d vacancy in Krypton

All possible channels of double Auger decay of a 3d vacancy in a Kr atom are investigated using perturbation theory in a basis of Hartree-Fock wave functions. The energy spectrum of the Auger electrons and the total decay width are calculated. The role of model decay mechanisms is discussed, along with the importance of taking correlation interactions into account. Tomsk Polytechnic University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 54–63, October, 1998.     

Theoretical and Experimental Study of Singly－resonant Optical Parametric Oscillator

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Fine Structure of the Optical Spectrum and Multiparticle Excitations in Rb2MnCl4

Results of experimental investigations into the optical absorption spectrum of Rb₂Mn_xCd_1–x Cl₄ solid solutions corresponding to ⁶ A _1g ⁴ A _1g ⁴ E _g transitions in manganese ions are presented. The spectra were measured at variable temperatures, magnetic fields, and concentrations x. The magnetic phase transitions accompanying variations of these parameters cause considerable changes in the spectrum. The exciton and exciton-magnon bands, their cold and hot magnon analogs, and the phonon satellite bands have been detected. The specific features of the optical absorption spectrum caused by the low-dimensional magnetic order are elucidated.     

Ab-initio calculations of pair-correlation effects on the hyperfine structure of the 4s 4p and 4s 3d configurations of Ca

The hyperfine structure of the 4s 4p and 4s 3d configurations of Ca has been evaluated using many-body perturbation theory. Single excitations and pair-correlation effects have been included by solving coupled one-particle and two-particle differential equations numerically. The correlation between the valence electrons has been treated selfconsistently by solving these equations iteratively for the valence pair. Core-polarisation effects have been evaluated by hyperfine-induced single-particle functions. From the calculated and experimental results of the two configurations,Q=?49(5) mb has been evaluated for the nuclear quadrupole moment of⁴³Ca.     

Fine structure and isotope shift of the 3s4d 3 D-3s3p 3 P, 3s5d 3 D-3s3p 3 P and 3p 2 3 P-3s3p 3 P Transitions of MgI

Summary We report the measurements of the³ D(3s4d)-³ P(3s3p)³ D(3s5d)-³ P(3s3p), and³ P(3p ²)-³ P(3s3p) transition frequency of MgI, the fine-structure separation and isotope shift between²⁴Mg and²⁶Mg. The measurements have been performed in a metastable atomic beam; a good agreement is found for data already existing in the literature. The accuracy of the measurements reported in this paper is mainly limited by the Doppler broadening of theI ₂ transitions used as a reference and by the precision in the knowledge of the related wavelengths.