The structure of He-7

We have studied the properties of the unbound isotope of helium He-7, using the H-2(Li-8,He-3)He-7 reaction. When combined with prior measurements of the H-2(He-6,p)He-7 reaction the data present a consistent picture for the low-lying excited states of He-7, specifically the negative parity sequence 3/2(-) (ground state) 1/2(-) (first-excited) and 5/2(-) (second-excited). The shapes but not the absolute magnitudes of the angular distributions are reproduced by ab-initio theory coupled with a DWBA reaction framework.