Photodissociation spectroscopy and ab initio calculations for the Sr+–N2 complex

Electronic vibrationally resolved spectra of the Sr+–N2 complex have been recorded in two energy regions 20 284–22 988 cm−1 and 15 576–16 380 cm−1. In the high energy region, two progressions are present and they are attributed to the (2)2Π3/2,1/2 ← X 2 Σ + transitions assuming a linear molecule. This linear configuration is supported from the observed spin–orbit splitting of these excited states as well as from electronic structure calculations. The lower energy spectrum shows a structure, which ends up to a continuum. Considering the complex as an anharmonic oscillator, the spectroscopic constants and the dissociation energies of the corresponding states are determined.