Vibronic and Rotational Energy Levels of a Linear Triatomic Molecule in a3Pgr; Electronic State

摘要

Expressions are presented for the vibronic and rotational energy levels of a linear triatomic molecule in a3Pgr; electronic state which take into account spinhyphen;orbit and vibronic (Renner) interactions. The results are valid when both interactions are small compared to the frequency of the bending vibration. It is shown that the vibronic energy levels can be divided into two sets, such that the energies of one set are like those of the vibronic states of a1Pgr; electronic state, whereas the energies of the other set are like those of the vibronic states of a2Pgr; electronic state. Some similarities and differences between the expressions for the rotational energy levels presented here and the corresponding expressions for diatomic molecules are discussed.