Fine and hyperfine interactions of PbF studied by laser-induced fluorescence spectroscopy
Fine and hyperfine interactions of PbF studied by laser-induced fluorescence spectroscopy
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激光诱导荧光光谱研究 PbF 的精细和超精细相互作用
DOI：
10.1063/5.0099716
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发表时间：
2022
影响因子：
4.4
通讯作者：
Jinjun Liu
中科院分区：
文献类型：
--
作者：
Chengcheng Zhu;Hailing Wang;Ben Chen;Yini Chen;Tao Yang;Jianping Yin;Jinjun Liu
利用激光诱导荧光（LIF）光谱法研究了PbF中精细和超精细的相互作用。在喷射冷却条件下，用激光烧蚀铅棒，并与sf6反应生成冷PbF分子束。用旋转分辨率、精细结构分辨率和超精细结构分辨率记录了208pbf、207pbf和206pbf同位素物的b2 Σ + - x2 Π 1/2体系（0,0）波段的LIF激发谱。LIF光谱中的跃迁与先前在近红外区域的x2 Π 3/2 - x2 Π 1/2发射光谱[Ziebarth et al.， J. Mol. Spectrosc. 191, 108-116(1998)]和PbF的x2 Π 1/2状态纯旋转光谱[Mawhorter et al., Phys.]Rev. A 84, 022508（2011）在全局拟合中导出了地面（x2 Π 1/2）和激发态（b2 Σ +）的旋转、自旋-轨道、自旋-旋转和超精细相互作用参数。本工作中确定的分子常数与先前报道的值进行了比较。特别地，讨论了207pb的超精细参数A⊥和A‖的意义。
The fine and hyperfine interactions in PbF have been studied using the laser-induced fluorescence (LIF) spectroscopy method. Cold PbF molecular beam was produced by laser-ablating a Pb rod under jet-cooled conditions, followed by the reaction with SF 6 . The LIF excitation spectrum of the (0, 0) band in the B 2 Σ + – X 2 Π 1/2 system of the 208 PbF, 207 PbF, and 206 PbF isotopologues has been recorded with rotational, fine structure, and hyperfine-structure resolution. Transitions in the LIF spectrum were assigned and combined with the previous X 2 Π 3/2 – X 2 Π 1/2 emission spectrum in the near-infrared region [Ziebarth et al., J. Mol. Spectrosc. 191, 108–116 (1998) and the X 2 Π 1/2 state pure rotational spectrum of PbF [Mawhorter et al., Phys. Rev. A 84, 022508 (2011) in a global fit to derive the rotational, spin–orbit, spin–rotation, and hyperfine interaction parameters of the ground ( X 2 Π 1/2 ) and the excited ( B 2 Σ + ) electronic states. Molecular constants determined in the present work are compared with previously reported values. Particularly, the significance of the hyperfine parameters, A ⊥ and A ‖ , of 207 Pb is discussed.