1. Structure of 12Be: intruder d-wave strength at N=8
- Author
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Pain, S. D., Catford, W. N., Orr, N. A., Angelique, J. C., Ashwood, N. I., Bouchat, V., Clarke, N. M., Curtis, N., Freer, M., Fulton, B. R., Hanappe, F., Labiche, M., Lecouey, J. L., Lemmon, R. C., Mahboub, D., Ninane, A., Normand, G., Soic, N., Stuttge, L., Timis, C. N., Tostevin, J. A., Winfield, J. S., Ziman, V., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
shell model ,breaking of the magic numbers ,12Be ,11Be ,nuclear structure ,light nuclei ,neutron removal ,Nuclear Theory ,FOS: Physical sciences ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,25.60.Dz, 21.60.Cs, 24.10.-i, 27.20.+n - Abstract
The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the 0 hbar omega neutron p1/2-orbital and the 1 hbar omega, neutron d5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be., Comment: 5 pages, 2 figures
- Published
- 2005