Reliable (reported energy within 300 eV of a reference energy)
Comment:
6 ML Ge/n-type Si(111)-(7x7). The thickness was determined by quartz-crystal thickness monitor. Branching ratio of the bulk and surface comp. are 0.509 and 0.529, respectively. Surface core-level shift derived from analysis of spectra for photon energies of 108 eV and 130 eV.