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STUDIES ON HYPERFINE STRUCTURE AND ISOTOPE SHIFT OF SOME EXCITED STATES IN Yb AND Tm ATOMS 下载免费PDF全文
The hyperfine structures and isotope shifts in some excited states of Yb and Tm have been measured using laser-atomic beam interaction, stepwise excitation and fluorescence detection techniques. From the experimental results, magnetic dipole hyperfine constants A and electric quadrupole hyperfine constants B have been derived. So for as we know, the A factor of [4f125d6s6p]9/2 level in Tm is given for the first time. 相似文献
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通过激光与原子束相互作用,三步激发及时间分辨光谱术,测量了Yb原子奇宇称受扰里德堡系6snp^1,3P121个能级和两上干扰能级的自然辐射寿命,分析了各种因素对测量值的影响。 相似文献
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A theoretical study of the kinetics of two-step-excitation upconversion ultraviolet cw fiber laser based on the 4f5d state in Pr3+:ZBLAN is performed using steady population rate equations and light propagation equations. Under different Pr3+ concentrations, the dependence of the threshold pump powers on the other pump power, the variations of laser output power with reflectivity of output coupler, pump powers and fiber length as well as the dependence of the optimum fiber length on pump powers are investigated. The results predict some optimum laser parameters for maximizing output power. 相似文献
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本文简要地描述了激光共振电离质谱的实验装置和测量方法,给出了用共振电离质谱方法对锌掺杂化合物半导体材料进行分析的光谱和质谱图,并估计了用这种方法进行痕量分析可能达到的检测限. 相似文献
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Radiative lifetimes of Rydberg 6pnd J=2 states of Pb I by multichannel quantum defect theory 下载免费PDF全文
Energy levels of the odd-parity 6pnd J=2 Rydberg states of Pb I are analysed by the multichannel quantum defect theory (MQDT) in the frame of a five-channel three-limit calculation model. With optimal MQDT parameters, channel admixture coefficients are obtained and used to calculate the theoretical lifetimes of the levels by comparing to the previously measured lifetimes. The predicted lifetimes for higher-lying Rydberg states are given and discussed. These predicted lifetimes are very different from those obtained by the four-channel two-limit model pl:eviously used, which means that introduction of the additional interacting channel is important for studying the 6pnd J=2 Rydberg states of Pb I. 相似文献
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火焰中N_2分子CARS谱及温度测量 总被引:2,自引:0,他引:2
本文实现了对乙炔/空气火焰中N_2分子CARS谱的测量,同时也进行了N_2分子CARS谱的理论计算,通过实验测量与理论计算比较,确定了火焰的温度.其结果与我们用OH基荧光方法测量的结果基本符合. 相似文献
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把脉冲可调谐染料激光器的激光调谐到钠原子3~2S_(1/2)—3~2P_(1/2)的共振激发线(ν=16961cm~(-1)),激励火焰中的钠原子。通过激光饱和激励感生非共振荧光光谱方法进行钠原子的灵敏检测,实际的检测限可达10~(-11)g/ml。 相似文献
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