共查询到18条相似文献,搜索用时 78 毫秒
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铍原子的能级和超精细结构的研究 总被引:1,自引:0,他引:1
采用多组态相互作用方法及Rayleigh Ritz变分法 ,并考虑相对论修正、质量极化效应等 ,获得了铍原子低激发态 1s2 2s2p3 Po和 1s2 2p2 3 P高精度的相对论能量 .同时还计算了铍原子超精细结构常数 ,与其他理论和实验结果符合得很好. The Rayleigh-Ritz variational method is used with a multiconfiguration-interaction function and restricted variation method to obtain the relativistic energies of 1s 22s2p 3P o and 1s 22p 2 3Pin beryllium, including the mass polarization and relativistic corrections. Hyperfine structure is also studied to compared with theoretical and experiment data in the literature. 相似文献
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用铥空心阴极灯,采用光电流光谱技术测得铥原子21条一级跃迁谱线,确定了相应跃迁上能级的超精细结构常数,其中7个能级的参数为首次发表,运用同一空心阴极灯,采用双色双光子级联共振技术,由荧光法首次测得4个第二激发能级的超精细结构常数. 相似文献
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本文引进二能级原子体系能够的产生二项式分布的二项式态,讨论了它的产生及其压缩、反聚束和亚泊松统计特性,在一定的极限下,二项式态趋于Glauber相干态,此时二项式分布也趋于泊松分布。这一极限使体系的一切非经典效应消失。同时采用Bloch矢量模型讨论了单原子一般二项式态的量子特性。最后把原子体系的二项式态与玻色子体系的二项式态作了比较,并指出二能级原子体系中并不能产生玻色子二项式态。
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考虑真空涨落能量为负的特点,提出一个能够简洁描述原子与真空涨落相互作用的方程,得到原子处于激发态的概率随时间变化的关系,讨论了原子自发辐射的速率与真空涨落的强度的关系. 相似文献
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考虑到光场的振幅随时间分布的影响时,我们重新研究了光场与二能级原子相互作用的跃迁几率问题。在强光信号作用下,经过一定的数学代换后,上能级几率的求解可归结为类希尔方程求解;在弱光信号作用下,利用转动波近似(RWA),给出了二能级原子跃迁几率的解析表达式,并讨论了几种典型脉冲光场的分布。 相似文献
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采用多组态相互作用方法及Rayleigh-Ritz变分法,并考虑相对论修正、质量极化效应等,从而获得了类铍C^2 离子内壳高位激发态^5P(m)(m=2~5)系列高精度的波函数和相对论能量以及精细结构,同时还计算了类铍^11C^2 离子双激发态系列1s^2pnp^3P(n=2~5)的相对论能量和超精细结构,我们的结果与其他理论和实验结果符合得很好。 相似文献
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Boris F. Samsonov V. V. Shamshutdinova D. M. Gitman 《Czechoslovak Journal of Physics》2005,55(9):1173-1176
We study chains of transformations introduced in B.F. Samsonov and V.V. Shamshutdinova: J. Phys. A: Math. Gen. 38 (2005) 4715, in order to obtain electric fields with a time-dependent frequency for which the equation of motion of a two-level
atom in the presence of these fields can be solved exactly. We show that a polynomial pseudosupersymmetry may be associated
to such chains.
Presented at the 3rd International Workshop “Pseudo-Hermitian Hamiltonians in Quantum Physics”, Istanbul, Turkey, June 20–22,
2005. 相似文献
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Effects of an applied low frequency field on the dynamics of a two-level atom interacting with a single-modefield 下载免费PDF全文
The effects of an applied low frequency field on the
dynamics of a two-level atom interacting with a single-mode field
are investigated. It is shown that the time evolution of the atomic
population is mainly controlled by the coupling constants and the
frequency of the low frequency field, which leads to a low frequency
modulation function for the time evolution of the upper state
population. The amplitude of the modulation function becomes larger
as the coupling constants increase. The frequency of the modulation
function is proportional to the frequency of the low frequency
field, and decreases with increasing coupling constant. 相似文献
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Eberhard Widmann 《Hyperfine Interactions》1999,119(1-4):195-200
This paper discusses the level splitting of the antiprotonic helium atomcule, an exotic atom consisting of a helium nucleus,
an electron, and an antiproton which occupies highly excited states with angular momentum of L ≈ 30–35. The observation of a splitting in a laser transition between two levels is presented, and an experiment in preparation
at the forthcoming AD facility at CERN is described which aims at directly measuring the level splitting by using a 2-laser
microwave triple resonance technique. This experiment has the potential to determine the magnetic moment of the antiproton
with higher precision than currently known.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献