Optical observation of the 3ssigma_gF ~3PI_u Rydberg state of N_2

摘要

Using ultrahigh-resolution 1 XUV+1 UV two-photon ionization laser spectroscopy,the F ~3PI_u implied by X ~1sum_g~+(0,0)transition of N_2 has been optically observed for the first time,and the 3ssigma_gF ~3PI_u(upsilon=0)Rydberg level fully characterized with rotational resolution.The experimental spectroscopic parameters and predissociation level widths suggest strong interactions between the F state and the 3ppi_uG ~3PI_u Rydberg and C'~3PI_u valence states,analogous to those well known in the case of the isoconfigurational ~1PI_u states.