Reexamination of the 0-g pure long-range state of Cs2:: Prediction of missing levels in the photoassociation spectrum
Reexamination of the 0-g pure long-range state of Cs2:: Prediction of missing levels in the photoassociation spectrum
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DOI：
10.1103/physreva.75.052501
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发表时间：
2007-05-01
影响因子：
2.9
通讯作者：
Dulieu, Olivier
中科院分区：
文献类型：
--
作者：
Bouloufa, Nadia;Crubellier, Anne;Dulieu, Olivier
重新研究Cs-2的0（g）（-）势的外阱的光缔合光谱收敛到（6s（1/2）+ 6p（3/2））极限，以解决以前发表的论文[Phys.Rev.Lett. 85，1408（2000）]。我们使用与之前其他分析[Phys. Rev. A 66，052506（2002）]中相同的势分析描述，但我们在观察到的振动线的分配中进行了2的位移。实验和计算的能量位置之间的协议得到改善和强度计算使用新的潜在帐户以及所有可用的数据。拟合过程揭示了模型参数之间的强相互依赖性，这限制了6（p）（2）P（1/2）和6p（2）P（3/2）原子能级辐射寿命测定的准确性。只有更精确的实验研究才能改进这些寿命值的测定。
A reexamination of the photoassociation spectrum of the external well of the 0(g)(-) potential of Cs-2 converging to the (6s(1/2) + 6p(3/2)) limit is performed, in order to resolve inconsistencies arising from a previously published paper [Phys. Rev. Lett. 85, 1408 (2000)]. We use the same analytical description of the potential as in an other previous analysis [Phys. Rev. A 66, 052506 (2002)], but we make a shift of 2 in the assignment of the observed vibrational lines. The agreement between experimental and calculated energy positions is improved and the intensities calculated using the new potential account well for all available data. The fitting procedure reveals a strong interdependence of the parameters of the model, which limits the accuracy of the determination of the radiative lifetimes of the 6(p)(2)P(1/2) and 6p(2)P(3/2) atomic levels. Only a more precise experimental study could allow one to improve the determination of these lifetime values.