Theoretical study of the rovibrationally resolved transitions of CaH

Abstract

Comprehensive absorption line lists for CaH40 have been calculated for electronic transitions from the X 2Σ+ ground state to the A 2Π, B/B′ 2Σ+, and E 2Π low-lying excited states. The lists include transition energies and oscillator strengths for all possible allowed transitions and were computed using the most recent set of theoretical potential energy curves and dipole transition moment functions, with adjustments to account for experimental dissociation energies and asymptotic limits. Good agreement with previous calculations and available experimental data has been obtained. Oscillator strengths for the transition from the X 2Σ+ state to the D 2Σ+ state are also given, but due to the large uncertainty of the available dipole transition moment function the line list is highly uncertain. For the C 2Σ+←X 2Σ+ transition, a Franck–Condon approximation has been used.