Visualizing $^{11}$N by resonance reactions
- Axelsson, L.
- Markenroth, K.
- Borge, M.J.G.
- Fayans, S.
- Goldberg, V.Z.
- Grevy, S.
- Guillemaud-Mueller, D.
- Jonson, B.
- Kallman, K.M.
- Lonnroth, T.
- Lewitowicz, M.
- Mangard, P.
- Martel, I.
- Mueller, A.C.
- Mukha, I.
- Nilsson, T.
- Nyman, G.
- Orr, N.A.
- Riisager, K.
- Rogatchev, G.V.
- Saint-Laurent, M.G.
- Serikov, I.N.
- Sorlin, O.
- Tengblad, O.
- Wenander, F.
- Winfield, J.S.
- Wolski, R.
DOIAbstract
International audienceThe proton-rich, unbound nucleus 11N has been studied using the technique of elastic resonance scattering in inverse geometry. The spins and parities of the three lowest resonance levels have been determined as 1/2+, 1/2− and 5/2+, resulting from the orbitals 1s1/2, 0p1/2 and 0d5/2, respectively. This level ordering is the same as the one found in the mirror nucleus of 11N, namely the one-neutron halo nucleus 11Be. Especially, the in 11Be well known level inversion, where the ground state is a 1/2+ intruder state below the from a naive shell model expected ground state 1/2−, is also found in 11N
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