Refracting instrument for ultraviolet inverse photoemission spectroscopy

Abstract
An instrument is described for k-resolved ultraviolet inverse photoemission spectroscopy using a LiF lens monochromator and a rotatable high-perveance electron gun. The energy resolution from all sources at ℏω=11 eV is 0.6 eV (FWHM). The angular spread of the incident electrons is calibrated using the properties of a well-known and well-characterized surface state on Cu(111), and is found to be 7°(FWHM).