Reliable (reported energy within 300 eV of a reference energy)
Comment:
4/3 ML Pb/Ge(111)-(R3xR3)R30 degrees. The sample was cleaned by several cycles of Ar+ ion bombardment (Ep = 500 eV) while annealing at 773 K followed by 15 min anneals at 1073 K. Peak locations: Voigt function. Branching ratio = 0.595. The thickness was measured using a quartz-crystal thickness monitor.