Electron-stimulated desorption of europium atoms from the surface of a germanium monolayer deposited on tungsten
Kuznetsov Yu.A.1, Kuzmin M.V.1, Lapushkin M.N1
1Ioffe Institute, St. Petersburg, Russia
Email: Kuznets@ms.ioffe.ru, m.kuzmin@ms.ioffe.ru, Lapushkin@ms.ioffe.ru
The adsorption of europium on the surface of a germanium monolayer deposited on a tungsten substrate using electron-stimulated desorption was studied. It was found that the electron-stimulated desorption of Eu atoms at europium coverages of less than 0.3 monolayers is caused by the excitation of the Eu 5p and Eu 5s states, and at coverages of more than 0.4 monolayers it is caused by the excitation of the states: W 4f, W 5p and W 5s. A model of electronic transitions has been proposed to explain the processes that occur during the electron-stimulated desorption of europium atoms. Keywords: electron-stimulated desorption, adsorption, germanium, tungsten, europium.
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