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Structure of 12Be: intruder d-wave strength at N=8 |
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| Authors: | Pain S D Catford W N Orr N A Angélique 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 Soić N Stuttge L Timis C N Tostevin J A Winfield J S Ziman V |
| Institution: | Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom. |
| 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 FORMULA: SEE TEXT]orbital and the FORMULA: SEE TEXT], 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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