High resolution spectroscopy of B0u+←X0g+ transitions in 130Te2: Reference lines spanning the 443.2-451.4 nm region

Qinning Lin; Jie Ma; James Coker; Renjun Pang; Zesen Wang; J E Furneaux; Jianping Yin; Tao Yang

doi:10.1016/j.saa.2024.123887

High resolution spectroscopy of B0_u⁺←X0_g⁺ transitions in ¹³⁰Te₂: Reference lines spanning the 443.2-451.4 nm region

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Apr 15:311:123887. doi: 10.1016/j.saa.2024.123887. Epub 2024 Jan 14.

Authors

Qinning Lin¹, Jie Ma¹, James Coker², Renjun Pang¹, Zesen Wang¹, J E Furneaux³, Jianping Yin¹, Tao Yang⁴

Affiliations

¹ State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, PR China.
² Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019, USA.
³ Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019, USA. Electronic address: furneaux@ou.edu.
⁴ State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, PR China; Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1 - Street, Urumqi, Xinjiang 830011, PR China; Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, PR China. Electronic address: tyang@lps.ecnu.edu.cn.

PMID: 38341931
DOI: 10.1016/j.saa.2024.123887

Abstract

Molecular tellurium (¹³⁰Te₂) has long been regarded as a promising candidate for a variety of spectroscopic applications, especially as a frequency reference. Absorption lines of ¹³⁰Te₂ were published extensively in the past few decades, however, the spectral resolution was not sufficiently high to be considered a precision spectroscopic reference. Here, a high resolution spectral atlas of ¹³⁰Te₂ Doppler-free saturated absorption transitions is reported, and used to assign multiple ro-vibrational bands in the B(Σu-3)0_u⁺←X(Σu-3)0_g⁺ electronic transition via the Dunham model, giving updated Dunham parameters and diatomic constants for the B(Σu-3)0_u⁺ state at an unprecedented level of precision. Our findings reveal spectroscopic properties of ¹³⁰Te₂ that might eventually contribute to frequency reference in precision measurement such as the quest for non-zero electron's Electric Dipole Moment (eEDM).

Keywords: Diatomic molecules; Frequency reference; Saturated absorption spectroscopy; Tellurium spectrum.