Author/Authors :
M Chartier، نويسنده , , J.R. Beene، نويسنده , , B Blank، نويسنده , , L Chen، نويسنده , , A. Galonsky، نويسنده , , N Gan، نويسنده , , K Govaert، نويسنده , , P.G. Hansen، نويسنده , , J Kruse، نويسنده , , V Maddalena، نويسنده , , M Thoennessen، نويسنده , , R.L. Varner Jr.، نويسنده ,
Abstract :
The proton-stripping reaction from a 11Be radioactive beam incident on a beryllium target demonstrates that only (7±3)% of the 9Li residues in the reaction are in coincidence with the 2.7 MeV γ-ray corresponding to the 9Li first excited state. This implies that the previously observed low-energy neutrons from the decay of the unbound nucleus 10Li represent a direct l=0 transition to the 9Li ground state. Consequently, neutron-unbound 10Li is proven to have the same parity inversion as occurs in the case of 11Be with a 1s12 intruder state below the natural parity 0p12 state.
