Abstract

The dynamics of singly ionizing proton-helium collisionshave been studied experimentally for several energies of the projectile(0.2, 0.5, 1.0 and 1.3 MeV) with the technique of cold target recoil-ionmomentum spectroscopy (COLTRIMS). The complete final-statedistribution in momentum space of all three particles was determined bymeasuring the three momentum components of the emitted electron andthe coincident recoiling target ion. The momentum transfer and energyloss of the outgoing projectile was determined by momentum and energyconservation laws. Doubly differential cross sections of the kinematicallycomplete experimental investigation are presented. The present data arecompared with results from fast highly charged heavy-ion impactexperiments.

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