⁶ _ΛH Modeled as ⁴ _ΛH + n + n

A three-body calculation for the ⁶ _ΛHe and ⁶ _ΛH hypernuclei has been undertaken. The respective cores are ⁴ _ΛH. The interactions in the ⁶ _ΛHe system, modeled as ⁴ _ΛH H+p+n, are reasonably well known. For example, the p n interaction is well determined by the p n scattering data, the ⁴ _ΛH-p interaction can be fitted to the ⁵ _ΛHe binding energy. The ⁴ _ΛHe-n interaction can be fitted to α-n scattering data. For the ⁴He-n system the s-wave can be modeled alternatively as a repulsive potential or as an attractive potential with a forbidden bound state. We explore these alternatives in ⁶He, because the interaction comes into play in modeling ⁶ _ΛHe as well as in our ⁴ _ΛH + n + n model of ⁶ _ΛH, where the valence neutrons are Pauli blocked from the s-shell of the core nucleus.