High Resolution Spectroscopic Measurement of 130Te2: Reference Lines near 444.4 nm for eEDM Experiment using PbF molecules
High Resolution Spectroscopic Measurement of 130Te2: Reference Lines near 444.4 nm for eEDM Experiment using PbF molecules
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130Te2 的高分辨率光谱测量：使用 PbF 分子进行 eEDM 实验的 444.4 nm 附近的参考线
DOI：
10.1016/j.saa.2021.120754
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Tao Yang
中科院分区：
文献类型：
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作者：
Qinning Lin;Renjun Pang;Zesen Wang;Shunyong Hou;Hailing Wang;Jianping Yin;Tao Yang
分子碲(Te_2)具有广泛的潜在应用，包括频率基准。关于130Te2的光谱结果已有报道，但在A(2Σ+)(υ‘=0)←X 1 2Π1/2(υ=0)(∼444.4 nm)的PBF跃迁附近几乎没有谱线，这被认为是电子电偶极矩(EEDM)敏感跃迁。本文用饱和吸收光谱方法测定了130Te2的电子跃迁谱线，其中研究了B1(3Σu-)0u+(υ‘=10)←X1(3Σg-)0g+(υ=5)跃迁带的来源。用高阶Dunham模型对这些跃迁谱线进行了赋值，同时将激发态B1(υ‘=10)的Dunham参数更新到一个新的水平。然后使用PI伺服将TOPTICA TA-SHG Pro激光器锁定在单一吸收线上。我们的结果不仅提供了444.4 nm附近Te2光谱的指配图谱，而且有助于在电火花加工测量中对PBF分子进行稳定和灵敏的光谱检测，这对于理解标准模型以外的基础物理具有重要意义。
Molecular tellurium (Te 2) offers a wide range of potential applications, including frequency reference. Spectroscopic results about the 130 Te 2 spectrum were previously reported, but few lines lie around the PbF transition of A (2 Σ+)(υ′= 0)← X 1 2 Π 1/2 (υ= 0)(∼ 444.4 nm) which is regarded as an eEDM (electron’s Electric Dipole Moment) sensitive transition. Here electronic transition lines for 130 Te 2 were determined using the Saturated Absorption Spectroscopy method, where the origin of the transition band was investigated for the B 1 (3 Σ u-) 0 u+(υ′= 10)← X 1 (3 Σ g-) 0 g+(υ= 5) transition. The Dunham model with high orders was utilized to assign these transition lines, while Dunham parameters of the excited state B 1 (υ′= 10) were updated to a new level. The Toptica TA-SHG Pro laser was then locked to a single absorption line using a PI servo. Our results here not only provide the assigned atlas of Te 2 spectrum near 444.4 nm, but also contribute to a stable and sensitive spectroscopic detection of PbF molecules toward the eEDM measurement, which is significant in understanding the fundamental physics beyond the Standard Model.