Observation of the 3 3Σ+–X 1Σ+ transition of KRb by resonance enhanced two-photon ionization in a pulsed molecular beam: Hyperfine structures of 39K85Rb and 39K87Rb isotopomers
Observation of the 3 3Σ+–X 1Σ+ transition of KRb by resonance enhanced two-photon ionization in a pulsed molecular beam: Hyperfine structures of 39K85Rb and 39K87Rb isotopomers
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通过脉冲分子束中共振增强双光子电离观察 KRb 的 3 3Σ+–X 1Σ+ 跃迁：39K85Rb 和 39K87Rb 同位素异构体的超精细结构
DOI：
10.1063/1.1667464
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发表时间：
2004
影响因子：
4.4
通讯作者：
Sungyul Lee
中科院分区：
文献类型：
--
作者：
Yonghoon Lee;Youngjee Yoon;Bongsoo Kim;Li Li;Sungyul Lee
在脉冲分子束中通过共振增强双光子电离观察到KRb的3 3Σ+ -X 1Σ+跃迁。观察到39K85Rb和39K87Rb同位素体的超细分裂。从超细分裂的大小来看，我们发现主要的超细结构是由Rb核自旋和未配对电子自旋之间的费米接触相互作用所主导的。确定了39K85Rb的费米接触相互作用常数为291 MHz， 39K87Rb的费米接触相互作用常数为665 MHz。在KRb 3 3Σ+态中，电子自旋与Rb核自旋的耦合比与其他角动量的耦合更强，并且bβS态的超精细角动量耦合方案很好地描述了能级结构。测定了3 3Σ+态的分子常数和Rydberg-Klein-Rees势能曲线。
The 3 3Σ+–X 1Σ+ transition of KRb is observed by resonance enhanced two-photon ionization in a pulsed molecular beam. Hyperfine splittings of 39K85Rb and 39K87Rb isotopomers are observed. From the magnitude of hyperfine splittings, we found that the main hyperfine structure was dominated by the Fermi contact interaction between the Rb nuclear spin and the unpaired electron spin. The Fermi contact interaction constants were determined to be 291 MHz for 39K85Rb and 665 MHz for 39K87Rb. In the KRb 3 3Σ+ state the electron spin couples more strongly with the Rb nuclear spin than with other angular momenta, and the energy level structure is well described by the hyperfine angular momentum coupling scheme of the bβS case. The molecular constants and the Rydberg–Klein–Rees potential energy curve of the 3 3Σ+ state were determined.