Photoemission Studies of Indium

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Abstract
Measurements of the electron energy distributions of photoemitted electrons from crystalline and bulk liquid samples of indium show structure which can be related to the occupied density of states. The distributions from the crystalline sample show two major peaks: a strong one just below the Fermi level and a weaker one about 4.5 eV below the Fermi level. Similar structure in the distributions from the liquid sample suggest that electron energy levels for indium are determined primarily from short-range interactions. Two model calculations based on direct transitions and nondirect transitions can each predict the observed structure with reasonable accuracy. In either calculation, structure in the energy distributions can be traced to similar structure in the density of valence states.