Evidence for F(-) formation by simultaneous double-electron capture during scattering of F(+) from a LiF(001) surface.
Slow F(+) ions (v<0.1 a.u.) scattered from a clean and flat LiF(001) surface under a grazing angle of incidence exhibit a high probability for forming F(-) ions in the reflected beam, whereas no negative ions are found for neutral F(0) projectiles. From detailed studies of projectile energy loss and charge transfer, we find evidence for a correlated double-electron capture process in the formation of the F(-) ions.
Roncin
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Laboratoire des Collisions Atomiques et Moléculaires (CNRS UMR 8625), Batiment 351, Université Paris Sud, F-91405 Orsay Cedex, France. roncin@lcam.u-psud.fr
Borisov
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Khemliche
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Momeni
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Mertens
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Winter
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