A Molecular Beam Study of the (0,0) A2Π<- X2Σ+ Band of CaF Isotopologues

2025/05/05 by Bashiri, Termeh, Yu, Phelan, Hutzler, Nicholas R. +3
#Chemical Physics (physics.chem-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.2505.03045

Abstract

This study presents an experimental determination of spectroscopic parameters for the less-abundant isotopologues ⁴²CaF and ⁴⁴CaF, alongside ⁴⁰CaF, using high-resolution laser-induced fluorescence spectroscopy in a skimmed free jet expansion. We recorded spectra near the natural linewidth limit and derived spectroscopic constants for both the X²Σ⁺ and A²Π electronic states, including the fine and ¹⁹F magnetic hyperfine parameters. We also estimated the isotope amount ratio r(⁴⁴Ca/⁴⁰Ca), demonstrating the potential use of optical spectroscopy for calcium isotope analysis.

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