Kinetic-energy- and angular-resolved fragmentation of CO in vibrational-resolved C 1s excitation

Angular distributions of C+ + O+ from CO were measured, following vibrationally resolved C 1s excitations into the 2p pi, 3s sigma, and 3p pi orbitals as well as into higher unresolved orbitals. A time-of-flight mass spectrometer, with a multihit-type position-sensitive anode, was used for the measurements. The anisotropy parameters (beta) of C+ + O+ approach their theoretically expected values as the released kinetic energy in the fragmentation increases. The value of the beta parameters remains constant for all vibrational states within each orbital.