New experiments demand for a more precise analysis of continuum spectrum in ⁶He: technical details and formalism

A simple three-body model of ⁶He is extended to include sd-continuum states in the picture in addition to the already investigated p-states. The role of different continuum components in the weakly bound nucleus ⁶He is studied by coupling unbound spd-waves of ⁵He by using simple pairing contact-delta interaction. The main focus of this paper is to outline the procedure that allows the calculation of different configurations of ⁶He including continuum states and to set up basic ingredients for computations. The method and results discussed here will be used for the calculation of monopole, dipole, quadrupole and octupole response of ⁶He.