HIGH-RESOLUTION INNER-SHELL PHOTOIONIZATION OF NO

For the open-shell molecule NO, high-resolution photoionization studie s of N 1s and O 1s core excitations to antibonding pi and nonbonding Rydberg orbitals were performed. In each case three vibrationally spli t 1s2(2)pi 1s(pi*)2 transitions were observed, caused by the interact ions of the pi electrons, as well as two Rydberg series with 3PI and 1PI character. An unambiguous assignment of all observed resonances is given. A Franck-Condon analysis of some of the observed spectral prof iles yields vibrational frequencies and equilibrium internuclear dista nces of the various core-excited states of NO.