Inner-shell photoemission from atoms and molecules using synchrotron radiation

Photoelectron spectroscopy, in conjunction with synchrotron radiation, has been used to study inner-shell photoemission from atoms and molecules. The time structure of the synchrotron radiation permits the measurement of time-of-flight (TOF) spectra of Auger and photoelectrons, thereby increasing the electron collection efficiency. The double-angle TOF method yielded angle-resolved photoelectron intensities, which were used to determine photoionization cross sections and photoelectron angular distributions in several cases. Comparison to theoretical calculations has been made were possible to help explain observed phenomena in terms of the electronic structure and photoionization dynamics of the systems studied. Measurements have been made for the 3d subshell in krypton, the iodine 4d and 4p subshells in methyl iodide, the nitrogen K shell in N2 and NO, and the main and satellite lines in helium