共查询到18条相似文献,搜索用时 85 毫秒
1.
用微扰与变分相结合的方法计算了氦原子基态的斯塔克效应,通过计算发现这种方法简便直观,尤其适用于低激发态且电子数不太多的原子. 相似文献
2.
用有效哈密顿方法计算氢原子的斯塔克效应 总被引:6,自引:2,他引:4
本文应用有效哈密顿方法,在准确到二级近似的条件下,计算了氢原子第一激发能级在外电场中的分裂,为分析强场下的斯塔克效应提供了一个理论基础。 相似文献
3.
在一次效应的基础上,本文以n=2能级为例,计算了氢原子的二次斯塔克效应.计算结果表明,考虑了二次效应以后,能量只相对于一次效应有一移动而并不继续发生分裂,从而很好地解释了氢原子赖曼线系第一条谱线在电场作用下分裂为三条的现象. 相似文献
4.
利用塞曼哈密顿的球张量形式,采用将微扰理论与里兹变分方法相结合的方式,导出了氦原子1snp组态塞曼哈密顿矩阵元的一般形式,给出了氦原子1s3p组态塞曼效应之解,并绘出了不同磁场强度下氦原子1s3p组态的塞曼能级分裂图. 相似文献
5.
6.
在对圆极化光调谐及一些近似处理的基础上,圆极化光场中阻尼V-型三能级原子分为6个能级,并针对强场的弱场两种情形,导出了原子能级与能级衰减系数的具体表达式。 相似文献
7.
将基态氦原子的波函数取作1s2和1s2s两个组态函数的叠加,利用组态相互作用方法解析计算了氦原子基态的非相对论能量.计算结果表明,考虑激发态1s2s与基态的相互作用,可以获得0.029 38Hartree的基态能量修正.本文的解析组态相互作用方法可作为量子力学教学的有益补充. 相似文献
8.
9.
采用ππ偏振激光,通过两步激发和光电离方法,在0-154V/cm电场范围内,测定了Yb原子n-18附近m=0的斯塔克光谱,首次把包含斯塔克效应的能量矩阵对角化方法推广到Yb原子,所获得的理论斯塔克图与实验结果基本符合,观察到低场中斯塔克簇随电场增加呈现线性结构以及^1P1态与斯塔克簇在抗交叉过程中振子强度发生转移的现象,讨论了结构与量子亏损的关系。 相似文献
10.
11.
Persistent efforts in both theory and experiment have yielded increasingly precise understanding of the helium atom. Because
of its simplicity, the helium atom has long been a testing ground for relativistic and quantum electrodynamic effects in few-body
atomic systems theoretically and experimentally. Comparison between theory and experiment of the helium spectroscopy in 1s2p3P
J
can potentially extract a very precise value of the fine structure constant á. The helium atom can also be used to explore
exotic nuclear structures. In this paper, we provide a brief review of the recent advances in precision calculations and measurements
of the helium atom.
相似文献
12.
根据微扰论,在动量表象中讨论了三维和二维氦原子两电子体系基态能级一级修正的表达式.对于推广的两电子二体作用势,给出了基态能级一级修正的值. 相似文献
13.
The 1 1 0 +,1 1 (-1) + and 1 1 (-2) + states of the helium atom in the magnetic field regime between 0 and 100 a.u.are studied using a full configuration-interaction (CI) approach.The total energies,derivatives of the total energy with respect to the magnetic field and ionisation energies are calculated with Hylleraas-like functions in spherical coordinates in low to intermediate fields and Hylleraas-Gaussian functions in cylindrical coordinates in intermediate to high fields,respectively.In intermediate fields,the total energies and ionisation energies are determined in terms of Hermite interpolation,based on the results obtained with the two above-mentioned basis functions.Calculations show that the current method can produce lower total energies and larger ionisation energies,and make the two ionisation energy curves obtained with the two above-mentioned basis functions join smoothly in intermediate fields.Comparisons are also made with previous works. 相似文献
14.
15.
借助不可约张量理论,导出了氦原子2^3P态自旋-其他轨道相互作用能的理论计算式,在推导过程中完成了所有角向积分和自旋求和计算. 相似文献
16.
The g-factors of the 23P, 21P, and 33P states of the helium atom are calculated by using the vatiational wave functions constructed from the linear combinations of Slater-type basis sets. The relativistic corrections to order α2(a.u.) and the effect of the motion of the center of mass are treated by using first-order perturbation theory. Most of our predicted results are in good agreement with recent results of Yan and Drake, which were obtained by using the wave functions with doubled Hylleraas coordinates. Based on the analysis of the convergence pattern in our calculation, we believe that our predicted value of the δgL-factor for 33P state in 4He, 2.914 15×10-7, ought to be reasonable and accurate, although there are no corresponding experimental data available in the liteature yet to be compared with. 相似文献
17.
18.
从多能级原子与多模光场的相互作用哈密顿量出发,导出了Λ型三能级原子与双模光场的相互作用哈密顿量。在大失谐条件下将其化成等效的二能级形式-双模喇曼耦合模型。提出了该模型的一个改进型等效哈密顿量。该哈密顿量由两部分构成:一部为通常所谓的等效哈密顿量,另一部分描述原子能级的动态斯塔克移动。研究表明,在双模喇曼耦合模型的研究中,只考虑前者是不够的,还必须考虑后者。最后,我们研究了该系统中原子的动力学行为,发现崩塌-复苏的数目、崩塌时间和复苏时间均呈现新的特性。 相似文献