KINETIC-ENERGY-RESOLVED AND ANGULAR-RESOLVED FRAGMENTATION OF CO IN VIBRATIONAL-RESOLVED C 1S EXCITATION

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