Abstract
At normal photoelectron emission from the surface of W{100} an intense surface state has been well characterised. Adsorption of Cu, Ag and Au causes an attenuation of this state, which is completely absent for coverages in excess of one monolayer. This result does not confirm earlier field emission energy distribution studies which appeared to demonstrate the reappearance of the \\ ̄ gG state at exactly one, two and three monolayers. Further, we find that annealing to 800 K causes attenuation of the \\ ̄ gG state at even lower coverages, and attribute this to surface alloy formation. Even after annealing there is no return of the \\ ̄ gG state at higher coverages.
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