Spin–isospin excitation of 3He with three-proton final state

Abstract

Spin-isospin excitation of 3 He nucleus by proton-induced charge-exchange reaction, 3 He(p, n)ppp, at forward neutron scattering angle is studied in a plane wave impulse approximation (PWIA). In PWIA, cross sections of the reaction is written in terms of proton-neutron scattering amplitudes and response functions of the transition from 3 He to three-proton state by spin-isospin transition operators. The response functions are calculated with realistic nucleonnucleon potential models using a Faddeev three-body method. Calculated cross sections agree with available experimental data in substance. Possible effects arising from the uncertainty of proton-neutron amplitudes and three-nucleon interactions in three-proton system are examined.