Determination of the fine-structure properties of the 2p subshell of atomic chlorine

A measurement of the fine-structure properties of the atomic chlorine 2p su bshell has been carried out using electron spectrometry in conjunction with synchrotron radiation. We observe eight of the ten photopeaks predicted fo r this open-shell atom. Binding energies, relative intensities, and angular distribution parameters are reported for an incident photon energy of 245 eV. Experimental binding energies and intensities are in reasonable agreeme nt with our calculations using a Slater-Condon superposition-of-configurati on method. [S1050-2947(99)50309-0].