In-beam study of 254No
In-beam study of 254No
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DOI：
10.1007/s100500050318
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发表时间：
1999-09
期刊：
影响因子：
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通讯作者：
M. Leino;H. Kankaanpää;R. Herzberg;A. Chewter;F. Heßberger;Y. Le Coz;F. Becker;P. A. Butler
中科院分区：
文献类型：
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作者：
M. Leino;H. Kankaanpää;R. Herzberg;A. Chewter;F. Heßberger;Y. Le Coz;F. Becker;P. A. Butler
用受激拉曼光谱测量了Documentclass[12pt]{minimum}\usepackage{amsath}\usepackage{wa ysym}\usepackage{amsfonts}\usepackage{amsbsy}\usepackage{mathsfs}\usepackage{upgreek}\setlong{oddsidemargin}{-69pt}\Begin{Document}\end{Document}的基电子态超精细分裂。在514.5 nm处发射的Ar激光，通过光学共振(43-0)P(13)或R(15)的超精细跃迁的共振激发，驱动J“=13或J”=15转动基态的超精细能级之间的相干性。我们研究了各种实验参数对谱线形状的影响：光束几何形状、激光调制光谱、激光功率、分子频移。我们发现，只有光束像差才会引起线形的显著不对称性，从而导致在确定共振频率时产生误差。从考虑光束几何的线形理论表达式出发，对这种误差进行了详细的研究。理论预测与实验结果吻合较好。从测量中，已经计算出了改进的超精细相互作用常数集，对于J“=13和J”=15，这些常数对于两个水平都是相同的，除了四极耦合常数eqq表现出aj依赖关系外，我们将其归因于分子的离心形变。
Measurements of hyperfine splittings in the ground electronic state of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} have been performed by stimulated Raman spectroscopy. An argon laser emitting at 514.5 nm, drives the coherence between hyperfine levels of theJ”=13 orJ”=15 rotational levels of the ground vibronic state,viaresonant excitation of the hyperfine transitions of the optical resonances (43-0) P(13) or R(15). We study the influence of the various experimental parameters on the line shape: the beam geometry, the laser modulation spectrum, the laser power, the molecular frequency shifts. We show that only beam aberrations can give rise to a significant asymmetry of the line shape, which contributes to an error in the determination of the resonance frequency. From a theoretical expression of the line shape taking into account the beam geometry, a detailed study of this error is performed. The theoretical predictions and the experimental results are in very good agreement. From the measurements, improved sets of hyperfine interaction constants for the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} molecule have been calculated forJ”=13 andJ”=15. These constants are identical for both levels, except for quadrupole coupling constant eqQ which exhibits aJ-dependence, which we attribute to the centrifugal distortion of the molecule.