New Theoretical Line List for the B ′ 2 Σ + ← X 2 Σ + System of 24 MgH

Abstract

Fully quantum-mechanical techniques have been applied to compute the complete line list for the B' 2Σ+ ← X 2Σ+ system of 24MgH. The list includes transition energies and oscillator strengths over the wavelength range 11,850-32,130 cm-1, for all possible allowed transitions from the ground electronic state vibrational levels v'' = 0-11. This list was computed using the best available ab initio potential energies and dipole transition moment function, with the former adjusted to account for experimental data. The agreement of the current calculations with previous theoretical results and the line list of Kurucz is discussed. Although spectroscopic accuracy for a particular line cannot be claimed for our calculations, comparison is made with the recent astronomical measurements of Wallace et al. A line list for pure rovibrational transitions in the X 2Σ+ state is also presented.