Spectral Lineshapes Electron Screening

Thsreview critical ly evaluates the sultabi it.?'"rl~uer spectral line shape analysis as a source of electronic structure information. MiethodIs for extracting the true Auger line shape from the raw data and a theoretical framework'for semiquantitative interpretation of that line shape are presented. A wide range of recent applications, concentrating oil tile line shapes of the low Z. metals (Be,"Li, Na, fig, and Al), thle line shanes of C and Si, thle trans-ition metals, and finally those of the metal 'oxides and halides, are considered. Spectra for gas phase molecules, adsorbed molecules, and.solids are examined. Finally, new methods for controllinq the background, the initial state, the spin Polarization, and the angle o