共查询到19条相似文献,搜索用时 250 毫秒
1.
在类氢离子电子束缚能一级相对论修正的基础上,计算了原子核的体积效应及质量效应对较轻元素及同位素类氢离子能级的修正量,结果显示,原子核的体积及质量效应不仅导致同位异核氢及类氢离子精细结构能级出现分裂,还会导致类氢离子精细结构能级的简并消失。 相似文献
2.
利用全实加关联方法,以类锂等电子序列为研究对象,通过自旋-轨道相互作用和自旋-其它轨道相互作用算符的期待值计算了类锂离子等电子序列(Z=9~20)的高角动量1s2ng(n=5~9)激发态的精细结构劈裂.为了获得更精确的理论结果,在类氢近似下估算了高阶相对论修正和量子电动力学(QED)效应对精细结构的贡献,得到的结果与等电子序列规律符合的很好。 相似文献
3.
利用高剥离态类氢离子的势函数模型,计算了类氢Si离子的软X射线谱及 其精细结构,计算结果与实验值进行了比较。 相似文献
4.
胡木宏 《原子与分子物理学报》2015,32(6)
利用全实加关联方法,以类锂等电子序列为研究对象,通过自旋-轨道相互作用和自旋-其它轨道相互作用算符的期待值计算了类锂离子等电子序列(Z=9~20)的高角动量1s2ng(n=5~9)激发态的精细结构劈裂.为了获得更精确的理论结果,在类氢近似下估算了高阶相对论修正和量子电动力学(QED)效应对精细结构的贡献,得到的结果与等电子序列规律符合的很好。 相似文献
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采用Rayleigh-Ritz变分方法计算了B原子(离子)内壳层激发高自旋态(~(4,5,6)L,L=S,P)里德伯系列的能量和精细结构劈裂,利用截断变分方法改进非相对论能量,并利用一阶微扰理论计算了相对论能量修正和质量极化效应修正,利用屏蔽的类氢公式计算了量子电动力学效应和高阶相对论效应,从而得到了高精度的组态能量.利用精确计算的波函数,计算了这些高自旋态的电偶极辐射跃迁波长、振子强度和辐射跃迁概率.通过长度规范和速度规范计算的振子强度的一致性证明了本文计算的波函数是精确的.相比其他理论计算结果,本文计算的高自旋态的能级及跃迁波长数据与实验数据符合得更好.对于一些高位的内壳层激发高自旋态,相关的能级和跃迁数据为首次报道,本文的计算结果对相关实验光谱谱线标定具有重要意义. 相似文献
7.
以多电子精细结构哈密顿的球张量形式为基础,借助不可约张量理论,建立了类氟离子基态精细结构能量的解析表达式.完成了所有角向积分和自旋求和计算,使精细结构能量表示为若干个径向积分之和.在此基础上对类氟体系(Z=9~13)基态的精细结构能量进行了具体计算,计算结果与实验数据符合得较好. 相似文献
8.
以多电子原子精细结构哈密顿的球张量形式和不可约张量理论为基础,建立了计算多电子原子精细结构(包括自旋-轨道相互作用、自旋-其它轨道相互作用和自旋-自旋相互作用)能量的一般性解析理论形式,应用所建立的理论对类碳体系(Z=6~8)基态的精细结构能量进行了具体计算,计算结果与实验数据符合得较好. 相似文献
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类硼离子基态的精细结构(英文) 总被引:2,自引:2,他引:0
以多电子精细结构哈密顿的球张量形式为基础,借助不可约张量理论,建立了类硼离子基态精细结构能量的解析表达式.完成了所有角向积分和自旋求和计算,使精细结构能量表示为若干个径向积分之和.在此基础上计算了类硼体系(Z=5~8)基态精细结构能量,计算结果与实验数据符合得较好. 相似文献
11.
M. P. Silverman 《Il Nuovo Cimento D》1992,14(8):857-864
Summary Physical systems or processes invariant under mirror reflection are not expected to exhibit intrinsically chiral asymmetries.
Thus, it is ordinarily the case that unbounded and unexcited atoms (in the absence of weak nuclear interactions) should not
manifest circular birefringence. It is shown, however, that in a rotating reference frame the coupling of atomic spin angular
momentum to the angular velocity of the rest frame gives to optical activity even in the absence of contributions from nuclear
interactions and the classical Coriolis force. Ground-state atomic hydrogen is predicted to be optically active in the microwave
region near the hyperfine splitting frequency of 1420 MHz. Under appropriate circumstances, this spin-associated rotational
circular birefringence can be some ten orders of magnitude larger than that previously estimated for virtual electronic transitions
falling within the visible and UV portions of the spectrum. 相似文献
12.
The Hamiltonian of the four-body problem for a lithium atom is expanded in series. The level shift and level formula of a lithium atom in Rydberg states are achieved by means of the calculation of polarization of the atomic core (including the contribution of dipole, quadrupole and octupole components). We also consider the effect of relativity theory, the orbital angular momentum L and the spin angular momentum S coupling scheme (LS coupling) and high-order correction of the effective potential to the level shift. The fine structure splitting (N=5-12, L=4-9, J=L±1/2) and level intervals in Rydberg states have been calculated by the above-mentioned formula and compared with recent experimental data. 相似文献
13.
A.V. Volotka V.M. Shabaev G. Plunien G. Soff 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2003,23(1):51-56
The finite nuclear size effect on the hyperfine splitting of low-Z hydrogen-like atoms is studied in the external field approximation. A simple non-relativistic formula is proposed which expresses
the nuclear size correction to the hyperfine splitting in terms of moments of the nuclear charge and magnetization distribution.
The numerical results obtained via this formula are compared with corresponding results derived by means of the Zemach formula. A relativistic formula for the
nuclear size correction to the hyperfine splitting is also derived.
Received 18 March 2002 / Received in final form 14 November 2002 Published online 28 January 2003
RID="a"
ID="a"e-mail: plunien@physik.tu-dresden.de 相似文献
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HU Xian-quan XU Jie MA Yong ZHENG Rui-lun 《原子与分子物理学报》2006,23(Z1):59-63
The level shift and level formula of lithium atom in Rydberg states are achieved by means of the calculation of polarization of the atomic core (including the contribution of dipole moment, quadrupole moment and octupole moment);meanwhile, the effect of relativity theory, the orbital angular momentum L and the spin angular momentum S coupling (LS coupling), and high order correction of the effective potential are considered. The some fine structures (N=5~12,L=4~9,J=L±1/2) and the corresponding level intervals in Rydberg states can be calculated by the above-mentioned level formula and compared with correlated experimental data. 相似文献
16.
利用多组态Dirac-Fock方法,本文研究了高电荷态类锂等电子序列(Z=31~40)离子1s22p激发态的精细结构. 考虑高关联轨道的电子关联影响以及Breit相互作用、量子电动力学效应和原子核运动效应等高阶修正,计算了2P1/2和2P3/2精细能级的本征能量,能级劈裂结果与已有理论计算一致. 结果表明,类锂离子1s22p态精细结构劈裂满足高电荷态的等电子序列标度规律(~ Z4);发现离子空间尺寸随着原子序数增加收缩,相对论轨道1s1/2和2p3/2的径向电荷密度分布趋向于原子核. 相似文献
17.
M. I. Vysotsky 《Physics of Particles and Nuclei》2013,44(3):510-514
The spectrum of atomic levels of hydrogen-like ions originating from the lowest Landau level in an external homogeneous superstrong magnetic field is obtained. The influence of the screening of the Coulomb potential on the values of critical nuclear charges is studied. 相似文献
18.
根据对应原理,得到了类氢原子能态平均寿命半经典的计算公式τ(n,l),然后利用相对论单通道量子数亏损理论进行推广,得到用来计算考虑总角动量J的激发态寿命公式τ(n,l,l+1/2)和τ(n,l,l-1/2),利用单通道量子数亏损理论得到了碱金属原子n、l远大于1时激发态寿命的半经典公式τ(n.l)=τ0(m+M/nm/v/+M)2v7l(l+1/2)/n4,其计算结果和实验数据符合的很好. 相似文献
19.
For the determination of the bound-electron g factor
in hydrogen-like heavy ions the mass of the ion is needed at a
relative uncertainty of at least 1 ppb. With the
SMILETRAP Penning trap mass spectrometer at the Manne
Siegbahn Laboratory in Stockholm several mass measurements of ions
with even-even nuclei at this level of precision have been
performed so far, exploiting the fact that the mass precision
increases linearly with the ion charge. Measurements of masses of
the hydrogen-like ions of the two Mg-isotopes 24Mg and
26Mg are reported. The masses of the hydrogen-like ions are
23.979011054(14) u and 25.976562354(34) u,
corresponding to the atomic masses 23.985041690(14) u and
25.982592986(34) u, respectively. The possibility to use
these two isotopes for the first observation of an isotope effect
in the bound-electron g factor in hydrogen-like heavy ions is
discussed. 相似文献