Structure of 12Be: intruder d-wave strength at N=8

Details Structure of 12Be: intruder d-wave strength at N=8 Structure of 12Be: intruder d-wave strength at N=8

2005-10-16

arxiv.org/abs/nucl-ex/0510048v1

Phys.Rev.Lett. 96 (2006) 032502

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.96.032502

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.

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