精细结构

Frequency stabilization of the external cavity diode laser to the iodine hyperfine structure components using extra-cavity iodine cell has been extensively studied and reported.

使用腔外的碘蒸气室将外腔二极体雷射稳频在碘的超精细结构成分上，这个方法已经被广泛地研究和报导。

The diode laser at 657 nm has the characteristics of lower cost and higher power than that at 633 nm. Therefore, we use the 657 nm ECDL to investigate the saturation spectrum of the hyperfine structure components of P(84) 5-5 transition of 127I2 at 657.483 nm for frequency stabilization of our ECDL laser.

nm 波段的二极体雷射比起633 nm 波段的二极体雷射拥有较低的费用和较高的功率，因此，我们使用657 nm 波段的外腔二极体雷射来研究657.483 nm 波段之碘分子跃迁P(84 5-5 transition of 127I2，并将我们的外腔二极体雷射稳频在此跃迁的超精细结构成分上。

With the high sensitivity and high resolution of the CO intracavity Laser Magnetic Resonance spectrometer, the high-resolution spectra of the rare isotope molecule ~(15)N~(16)O in natural abundance were successfully observed, which provided experimentai data for the analysis of the hyperfine structure of NO molecule.

通过对中红外CO内腔激光磁共振光谱仪的改造，我们大大提高了该谱仪的探测灵敏度和分辨率，并成功用于探测NO稀有同位素分子~(15)N~(16)O的超高分辨光谱，为该分子的超精细结构和Λ-双分裂分析提供了实验依据。

Nuclear effects produce hyperfine structure.

原子核的影响引起超精细结构。

The electron paramagnetic resonance parameters g factors g(subscript //), g(subscript ⊥) and the hyperfine structure constants A(subscript //) and A(subscript ⊥) for the tetragonal KTaO3:Cu(superscript 2+) crystal are theoretically studied in this work.

用基团模型的3d^9离子在四角对称下的高阶微扰公式计算了KTaO3晶体中Cu(上标 2+)杂质中心的g因子g，g和超精细结构常数A和A。

On the basis of the perturbation formulae of the g-factors (fourth-order) and the hyperfine structure constants (third-order) for a 3d^9 ion in tetragonal symmetry, the spin Hamiltonian parameters for the Cu(superscript 2+)-doped LaSrAlO4 crystal are theoretically investigated.

根据晶体场理论，利用3d^9离子在四角对称中自旋哈密顿参量g因子的四阶微扰公式以及超精细结构常数A因子的三阶微扰公式，对掺Cu(上标 2+)的LaSrAlO4晶体的自旋哈密顿参量作出了理论分析。

On the basis of the perturbation formulae of the g-factors (fourth-order) and the hyperfine structure constants (third-order) for a 3d9 ion in tetragonal symmetry, the spin Hamiltonian parameters for the Cu2+-doped LaSrAlO4 crystal are theoretically investigated.

根据晶体场理论，利用3d9离子在四角对称中自旋哈密顿参量g因子的四阶微扰公式以及超精细结构常数A因子的三阶微扰公式，对掺Cu2+的LaSrAlO4晶体的自旋哈密顿参量作出了理论分析。

Since the contribution of the spin-orbital coupling interaction of the ligand to optical and electron paramagnetic resonance spectra can not be neglected, the optical and EPR spectra g factors g‖、g⊥ and hyperfine structure constant A‖、A⊥ of LiHSO4:VO2+ crystal are calculated from the high-order perturbation formulas on the basis of double-spin-orbital coupling model and crystal-field theory for 3d1 ion in tetragonal symmetry.

考虑到配体离子的自旋－轨道耦合作用对光谱和电子顺磁共振谱的贡献不可忽略，采用3d1离子在四角对称下基于双自旋－轨道耦合模型的高阶微扰公式和晶场理论公式，理论计算了LiHSO4：VO2+晶体的光谱和电子顺磁共振参量g因子g‖、g⊥和超精细结构常数A‖、A⊥。

The fine structure splittings of 1s2np (n 9) states for lithium-like Zn27+ ion are calculated by using the full-core plus correlation method.

用全实加关联方法计算了类锂Zn27+离子1s2np (n 9)态的精细结构。

In addition,most of theprevious studies are focused on a very narrowly-separated doublets(e.g.,hyperfinestructure,Stark or Zeeman splittings)in a closed system.In fact,the atomic ormolecular system,especially the excited one,is an open system,but there are only afew studies for it.

另外，以往研究的多能级系统中相邻两能级的间距都很小(通常为原子的超精细结构、斯塔克分裂或塞曼分裂)，且大多数理论研究基本上都集中于封闭系统；然而，实际原子或分子特别是激发态的原子或分子体系通常为一开放系统，对于这方面的研究也很少。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。