Nuclear effects produce hyperfine structure.
原子核的影响引起超精细结构。
So it is not necessary to use a broad-band laser to guarantee excitation efficiency for an atom with hyperfine split levels.
因此，在这样激光功率条件下，为提高原子激发效率而增加激光谱线宽度的做法并不是必要的。
The variation of the hyperfine interaction parameters and the variable mechanism of the sky-green glaze at liquid helium temperature is studied.
研究了在液氦温度下天青釉超精细相互作用参数的变化和参数变化的机制。
The relevant hyperfine parameters as a function of annealing time are shown and the result of experimental study is analyzed and discussed in detail.
给出了有关超精细参量随时间变化的规律，并对实验研究结果作出了分析与讨论。
The regular variation of crystallization temperature, magnetic ordering temperature and average hyperfine magnetic field of the amorphous alloys with Nb content were observed.
观察到非晶合金的晶化温度，磁有序温度和平均磁超精细场有规律性的变化。
The isotope shifts, hyperfine structure, spontaneous emission branch ratio of the first excited level and Doppler width of the atom vapor beam were measured using laser induced fluorescence.
采用原子蒸气束激光诱导荧光法测量钆原子的第一激发态的同位素位移及超精细结构、原子跃迁自发辐射的分支比和原子蒸气束的多普勒宽度。
Hyperfine spectrum; Nonlinear optics; Degenerate four waves mixing; The equivalent grating; Isotope detecting.
超精细光谱；非线性光学；简并四波混频技术；等效光栅；同位素检测。
Hyperfine spectrum; Nonlinear optics; Degenerate four waves mixing; The equivalent grating; Isotope detecting.
超精细光谱；非线性光学；简并四波混频技术；等效光栅；同位素检测。
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