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Title:Tantalum Oxide Spectroscopy To Facilitate Exploring New Physics Beyond The Standard Model
Author(s):Chung, Timothy
Contributor(s):Zhou, Yan; Cooper, Matthew Charles
Subject(s):Mini-symposium: Precision Spectroscopy for Fundamental Physics
Abstract:The molecular ion TaO$^+$ is a promising candidate to explore new physics beyond the Standard Model in both the leptonic and hadronic sectors via precision measurements of the electron's Electric Dipole Moment (eEDM) and Nucleus Magnetic Magnetic Quadrupole Moment (NMQM) [citation]. Similar to ThF$^+$ that is under active investigation[citation], the eEDM sensitive state of TaO$^+$, $^3\Delta_1$, is predicted to be the ground state that facilitates a long coherent measurement[citation]. Although TaO$^+$ has a smaller effective electric field (20.2 GV/cm) than ThF$^+$ (35.2 GV/cm), it has a non-zero nuclear spin ($I = 7/2$) for which the latter is 0, allowing for studies of symmetry break in the nucleus, such as the NMQM, in a single experimental system. To perform the above mentioned precision measurements, the first step is to create TaO$^+$ in the rovibraonic ground state ($^3\Delta_1$, v$^+$=0, and J$^+$=1). We plan to implement Resonant Enhanced Multiphoton Ionization (REMPI) method to create TaO$^+$ from its neutral precursor TaO in a supersonic cooled molecular beam. To locate an appropriate intermediate electronic state for the REMPI scheme, we perform laser induced fluorescence spectroscopy of TaO in the regime of 30,000-45,000 cm$^{-1}$ that is unexplored. Preliminary results of the survey spectroscopy and experimental design of the precision measurements will be discussed in this presentation.
Issue Date:2021-06-24
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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