Hyperfine-Resolved Spectroscopy of Dysprosium Monoxide (DyO)

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.