We have measured the ( 3 H+p) and ( 3 He + «) breakup of 4 He by 4 He(e,e'c) coincidence experiments at low momentum transfer («0.39 fm" 1 ) in the excitation energy region 22 < is* < 36 MeV. Both channels were studied simultaneously by detecting the charged fragments c =p, 3 H, and 3 He in the same detector system. The measured 4 He(e,ep) 3 H and 4 He(e,e'n) 3 He angular correlations as well as the deduced total 4 He(e,e'p) 3 H and 4 He(e,e7i) 3 He cross sections are reproduced by microscopic model calculations with a charge-symmetric nuclear Hamiltonian.
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