Abstract
A modified Born approximation calculation has been made in order to explain the high-energy proton spectra from the three-body breakup of the d+ 3He reaction and the high-energy neutron spectra from the three-body breakup of the d+ 3He reaction. The modification takes into account the p- 3He and n- 3He final-state interactions by means of the so-called factored wave function method. Effects of the Pauli principle on the breakup reaction are also considered. Complex p+ 3H and n+ 3He phase shifts are used which had been derived from a prior analysis of the 3H(p, p), 3H(p, n) and 3He(n, n) reactions. The present analysis shows that the main features of the energy and (forward) angular distributions of the high-energy nucleons from the three-body breakup of the d+ 3He and d+ 3H reactions can be reproduced by our simple approximation. The final-state interactions in the 4He system are consistent with experimental states in 4He peaking near 20.1 and 22 MeV excitation energy. The former state was previously shown by Werntz to be 0 +. The latter state has negative parity.
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