High-Resolution Study of the Near-Infrared A2Pi1/2-X2Sigma+ Transition of YS

Area of Science:

• Molecular Spectroscopy
• Physical Chemistry
• Atomic and Molecular Physics

Background:

• Yttrium Sulfide (YS) is a diatomic molecule with potential applications in materials science.
• Understanding the electronic states and transitions of YS is crucial for its characterization.
• Previous spectroscopic data for YS may be limited or require higher resolution.

Purpose of the Study:

• To record and analyze the high-resolution excitation spectrum of gaseous YS.
• To investigate the A 2Pi1/2-X 2Sigma+ electronic transition.
• To determine precise molecular constants for the involved electronic states of YS.

Main Methods:

• Laser excitation spectroscopy was employed to probe the YS molecule.
• YS molecules were generated in a supersonic molecular beam via laser ablation of yttrium atoms reacting with CS2.
• Rotational analysis of the observed spectral band was performed.

Main Results:

• A high-resolution excitation spectrum of gaseous YS was successfully obtained.
• The A 2Pi1/2-X 2Sigma+ transition band near 750 nm was rotationally analyzed.
• A comprehensive set of molecular constants for both the A 2Pi1/2 and X 2Sigma+ electronic states was determined.

Conclusions:

• The study provides valuable spectroscopic data for Yttrium Sulfide.
• The determined molecular constants enhance the understanding of YS electronic structure.
• This research contributes to the spectroscopic database of diatomic metal-containing molecules.