Fluorescence branching ratios and magnetic tuning of the visible spectrum of SrOH
Fluorescence branching ratios and magnetic tuning of the visible spectrum of SrOH
复制标题
SrOH 可见光谱的荧光支化比和磁调谐
DOI：
10.1016/j.jms.2018.02.007
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发表时间：
2017
影响因子：
1.4
通讯作者：
A. McCoy
中科院分区：
文献类型：
--
作者：
Duc;T. Steimle;I. Kozyryev;Meng Huang;A. McCoy
使用冷分子束样品的高分辨率无光场和塞曼光谱，对氢氧化锶 SrOH 的 X ̃ 2 Σ+(0, 0, 0)、A ̃ 2 Π r (0, 0, 0) 和 B ̃ 2 Σ+(0, 0, 0) 电子态中低旋转能级的磁调谐进行了实验研究。使用传统的有效哈密顿方法成功地对观察到的塞曼位移和分裂进行了建模，以解释 A ̃ 2 Π r 和 B ̃ 2 Σ+ 状态之间的相互作用。将确定的 X ̃ 2 Σ+、A ̃ 2 Π r 和 B ̃ 2 Σ+ 状态的磁 g 因子与微扰理论预测的磁 g 因子进行比较。记录并分析了 0 0 0 B ̃ 2 Σ+← X ̃ 2 Σ+、0 0 0 A ̃ 2 Π 3/2← X ̃ 2 Σ+ 和 0 0 0 A ̃ 2 Π 1/2← X ̃ 2 Σ+ 跃迁的旋转分辨分支特征的激光激发产生的分散荧光。将测量的荧光分支比与 Franck-Condon 计算进行比较。使用离散变量表示（DVR）方法导出所需的弯曲运动波函数。描述了 SrOH 激光减速和磁光捕获实验的意义。
The magnetic tuning of the low rotational levels in the X ̃ 2 Σ+(0, 0, 0), A ̃ 2 Π r (0, 0, 0), and B ̃ 2 Σ+(0, 0, 0) electronic states of strontium hydroxide, SrOH, have been experimentally investigated using high resolution optical field-free and Zeeman spectroscopy of a cold molecular beam sample. The observed Zeeman shifts and splittings are successfully modeled using a traditional effective Hamiltonian approach to account for the interaction between the A ̃ 2 Π r and B ̃ 2 Σ+ states. The determined magnetic g-factors for the X ̃ 2 Σ+, A ̃ 2 Π r, and B ̃ 2 Σ+ states are compared to those predicted by perturbation theory. The dispersed fluorescence resulting from laser excitation of rotationally resolved branch features of the 0 0 0 B ̃ 2 Σ+← X ̃ 2 Σ+, 0 0 0 A ̃ 2 Π 3/2← X ̃ 2 Σ+ and 0 0 0 A ̃ 2 Π 1/2← X ̃ 2 Σ+ transitions have been recorded and analyzed. The measured fluorescence branching ratios are compared with Franck-Condon calculations. The required bending motion wave functions are derived using a discrete variable representation (DVR) method. Implications for laser slowing and magneto-optical trapping experiments for SrOH are described.