Neutron-3H potentials and the 5H-properties

The continuum resonance spectrum of 5H (3H+n+n) is investigated by use of the complex scaled hyperspherical adiabatic expansion method. The crucial 3H-neutron potential is obtained by switching off the Coulomb part from successful fits to 3He-proton experimental data. These two-body potentials must be expressed exclusively by operators conserving the nucleon–core mean field angular momentum quantum numbers. The energies ER and widths ΓR of the 1/2+ ground-state resonance and the lowest two excited 5/2+- and 3/2+-resonances are found to be (1.6,1.5) MeV, (2.8,2.5) MeV and (3.2,3.9) MeV, respectively. These results agree with most of the experimental data. The energy distributions of the fragments after decay of the resonances are predicted.