AES spectrum of a clean Ag surface

It is worthwhile to point out that clean Ag has two weak Auger features at 50 and 80 eV (measured in this work), respectively, which are very close to a Li CW feature at 52 eV and a Li doubly ionized feature at 80 eV. A similar problem occurs in the XPS spectra of clean Ag. A Ag 4p XPS feature at 58 eV is very close to a Li Is peak at 54.7 eV. Moreover, the sensitivity factors of the Li Auger and photoelectron emissions are an order of magnitude smaller than those associated with Ag. This made the detection of low coverages of Li (submonolayers) on the Ag surface very difficult. For multilayer Li films relevant to this work, however, Li features dominated the spectra and the Ag features were noticeably attenuated. 

2 below), a chick layer of Li was always used in experiments studying che reaction of THF with Li to assure that at least one monolayer of metallic Li would remain on the Ag substrate. A Li film deposited on the Ag substrate was considered to be thick enough when all of the characteristic Ag XPS features were completely attenuated. The minimum thickness of these Li 

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