Abstract
The secondary emission yield of Li + from a LiF target bombarded with 2.0 MeV nitrogen ions was measured as functions of the incident ion charge state and of the target temperature. The results were discussed considering current models (Bitensky et al., Nucl. Instr. and Meth. B 72 (1992) 380; da Silveira and Matos, Surf. Sci. 326 (1995) 370) and the effects of the contaminant layer adsorbed on the target surface. It was found that the Li + emission yield shows a dependence on the ion pre-equilibrium charge state in contrast with the H + emission yield, which is known to be strongly dependent on the incident charge state of the projectile.
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