Structure of 12Be: intruder d-wave strength at N=8.
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.
Pain
S D
SD
Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom.
Catford
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Orr
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Angélique
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Ashwood
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Bouchat
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Clarke
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Curtis
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Freer
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Fulton
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Hanappe
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Soić
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Winfield
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Ziman
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