Abstract
Kinematically complete two-detector coincidence experiments have been performed in which (i) the angular distributions of the cross sections and (ii) the proton-proton relative energy distributions of the triple differential cross sections d 3σ dΩ 1 dΩ 2 dT 1 were measured for 12C( 3He, 2p) and 28Si( 3He, 2p) reactions. Five states in 29Si and two states in 13C were studied at an incident 3He energy of 40 MeV. Angular distributions for the ( 3He, 2p) cross sections were compared to corresponding measurements for ( 3He, d) reactions and to angular distributions predicted by distorted-wave calculations. The shapes of the ( 3He, 2p) and ( 3He, d) distributions are similar, and distorted-wave calculations which use deuteron-like optical potentials for the 2p cluster are reasonable representations of the ( 3He, 2p) data. Enhancements in the measured cross sections due to final-state proton-proton interactions were also observed.
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