TY - JOUR
T1 - Exotic Nucleus Helium-9 and its Excited States
AU - Seth, Kamal K.
AU - Artuso, M.
AU - Barlow, D.
AU - Iversen, S.
AU - Kaletka, M.
AU - Nann, H.
AU - Parker, B.
AU - Soundranayagam, R.
PY - 1987
Y1 - 1987
N2 - The ground state and several excited states of He9, the most neutron-rich nucleus to date, have been identified by means of the reaction Be9-,+)He9. The mass excess of the ground state has been measured and it is found that the nucleus is unbound against single-neutron decay by 1.10.10 MeV only. It is found that the excited-state spectrum of this nucleus, which is very far from the valley of stability, is in good agreement with the predictions of "no-core" shell-model calculations whose parameters were optimized for the stable nuclei in the valley.
AB - The ground state and several excited states of He9, the most neutron-rich nucleus to date, have been identified by means of the reaction Be9-,+)He9. The mass excess of the ground state has been measured and it is found that the nucleus is unbound against single-neutron decay by 1.10.10 MeV only. It is found that the excited-state spectrum of this nucleus, which is very far from the valley of stability, is in good agreement with the predictions of "no-core" shell-model calculations whose parameters were optimized for the stable nuclei in the valley.
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U2 - 10.1103/PhysRevLett.58.1930
DO - 10.1103/PhysRevLett.58.1930
M3 - Article
AN - SCOPUS:4043170663
SN - 0031-9007
VL - 58
SP - 1930
EP - 1933
JO - Physical Review Letters
JF - Physical Review Letters
IS - 19
ER -