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Hyperfine-Resolved Spectroscopy of Dysprosium Monoxide (DyO).

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We measured the hyperfine structure of dysprosium monoxide (DyO) to search for new physics. These results are crucial for developing laser cooling techniques and precision measurements using DyO molecules.

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Chemistry
  • Nuclear Physics

Background:

  • Dysprosium monoxide (DyO) is a promising molecule for searching for new physics due to its nuclear properties.
  • DyO's potential for optical cycling makes it suitable for laser cooling and precision measurements.
  • Understanding hyperfine structure is essential for these applications.

Purpose of the Study:

  • To determine the hyperfine structure of the ground X8 and excited [17.1]7 states in 161Dy and 163Dy isotopologues.
  • To provide foundational data for implementing optical cycling in DyO.
  • To benchmark theoretical calculations for sensitivity to symmetry-violating effects.

Main Methods:

  • Laser spectroscopy was employed to probe the hyperfine structure of DyO.
  • Measurements were performed on 161DyO and 163DyO isotopologues.
  • Results were interpreted using molecular orbital diagrams.

Main Results:

  • The hyperfine parameters for the ground and excited states of DyO were successfully determined.
  • The experimental data showed excellent agreement with relativistic quantum chemical calculations.
  • This work establishes key parameters for future precision measurements.

Conclusions:

  • The hyperfine structure of DyO has been precisely measured, validating theoretical predictions.
  • This study provides essential data for utilizing DyO in searches for new physics, such as the nuclear Schiff moment.
  • The findings pave the way for advanced quantum control and laser cooling techniques with DyO molecules.