Multichannel quantum defect theory and high-resolution spectroscopy of the hyperfine structure of high Rydberg states of {sup 83}Kr
Multichannel quantum defect theory and high-resolution spectroscopy of the hyperfine structure of high Rydberg states of {sup 83}Kr
复制标题
{sup 83}Kr 高里德堡态超精细结构的多通道量子缺陷理论和高分辨率光谱
DOI：
10.1103/physreva.68.032510
复制
发表时间：
2003
影响因子：
2.9
通讯作者：
F. Merkt
中科院分区：
文献类型：
--
作者：
H. Wörner;U. Hollenstein;F. Merkt
利用窄带宽真空紫外激光系统从\(^{1}S_{0}\)基态进行单光子激发，随后通过脉冲场电离，在低于\(^{2}P_{3/2}\)电离阈值的\(n = 30 - 190\)范围内测量了\(^{83}Kr\)的\(ns\)和\(nd\)里德堡态的超精细结构。已经发展了一种对稀有气体原子里德堡态超精细结构的多通道量子亏损理论（MQDT）处理方法，该方法定量地解释了在所研究的主量子数的整个范围内核自旋对光谱结构的影响。该模型允许根据离子超精细结构对里德堡态的超精细结构进行参数化，并基于在电子 - 离子碰撞的紧密耦合区域中与核自旋的相互作用可忽略的假设，预计该假设在其他原子和分子系统中也是有效的。从MQDT分析中推导出了\(J = 1\)和\(2\)的\(ns\)和\(nd\)里德堡系列的改进的本征量子亏损，并且确定了\(^{83}Kr^{+}\)基态的两个\(^{2}P_{3/2}\)和\(^{2}P_{1/2}\)自旋 - 轨道分量的超精细结构。
The hyperfine structure of ns and nd Rydberg states of {sup 83}Kr has been measured in the range n=30-190 below the {sup 2}P{sub 3/2} ionization threshold by pulsed-field ionization following single-photon excitation from the {sup 1}S{sub 0} ground state using a narrow-bandwidth vacuum-ultraviolet laser system. A multichannel quantum defect theory (MQDT) treatment of the hyperfine structure in Rydberg states of the rare-gas atoms has been developed that quantitatively accounts for the effects of the nuclear spin on the spectral structures over the entire range of principal quantum number investigated. The model allows the parametrization of the hyperfine structure of the Rydberg states in terms of the ionic hyperfine structure and relies on the assumption that the interaction with the nuclear spin is negligible in the close-coupling region of the electron-ion collision, an assumption that is also expected to be valid in other atomic and molecular systems. Improved eigen quantum defects for the ns and nd Rydberg series with J=1 and 2 have been derived from the MQDT analysis, and the hyperfine structure of the two {sup 2}P{sub 3/2} and {sup 2}P{sub 1/2} spin-orbit components of the ground state of {sup 83}Kr{sup +} has been determined.