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The Soft X-ray Emission and Absorption Spectra of Simple Metals

The soft X-ray emission and absorption spectra of simple metals provide information about transition density of states, many body effects and lattice relaxation dynamics. We find that many body effects are negligible for the K spectra of lithium and beryllium, but play an important role at threshold for the L2,3 spectra of sodium, magnesium, and aluminum. Many body threshold exponents may be derived from the data for these materials. Lattice relaxation processes are found to have an important effect on the emission edges of sodium and lithium. The shape width and separation of these materials have been analyzed to obtain core hole lifetimes.