Multireference calculation of lifetime of A2∏u state in nitrogen-molecule cation

Abstract

This paper utilizes multireference configuration interaction theory to calculate the lifetime of A2∏u state for nitrogen molecular ion N+2. It obtains the transition moment function for A2∏u → X2 σ+g, Pranck–Condon factors between vibrational levels of the two states. The calculated lifetimes are 16.81, 14.62, 13.10, 12.18, 11.40, and 11.64 μs for ν' = 0, 1, 2, 3, 4, 5 vibrational levels of A2∏u state, respectively, which are in excellent agreement with available experimental values.