Abstract
Impact of 60–200-keV B+ ions on polycrystalline Cu and Mo targets gives rise to emission from backscattered excited Be and B+. The emission coefficients for these lines are presented as a function of impact energy and analyzed to provide a measure of the survival parameter A/a for the atom or ion recoiling from the target. For B recoiling from both Cu and Mo, this is found to be 1.3×108 cm/sec, while for recoiling B+, it is 2.4×108. In the case of recoiling B+, the radiationless deexcitation must be by the Auger mechanism. Emission coefficients for the 3247, 3274-Å Cu I doublet are also presented and rise slowly throughout the energy range studied.
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