Improved spectroscopic parameters and rotational energy structure of the ground vibrational state of AsH3

Abstract

The spectroscopic rotational, centrifugal distortion and splitting parameters as well as the rotational structure of the ground vibrational state of the AsH${}_3$ molecule are improved considerably in comparison with the analogous information known in the literature by new precise infrared FTIR experimental data and an improved effective Hamiltonian for a symmetric vibrational state of the C${}_{3v}$ symmetry molecule. Compared with the corresponding results from previous studies, the results obtained in this study reproduce the original experimental parameters with more than ten times higher accuracy.