Comment:
Ag6.1Zn34.5/Ru(001). The Ru(001) crystal was cleaned by cycles of oxidation (p = 5E-8 Torr O2, T = 500 K, time = 5 min) and anealing to 1650 K. The temperature of the substrate during the deposition of Ag and Zn was ~350 K. The spectra were recorded at normal emission.