Direct Evidence for the Breakdown of theN=8Shell Closure inB12 | Zendy

A. Navin | Zendy; D. W. Anthony | Zendy; T. Aumann | Zendy; T. Baumann | Zendy; D. Bazin | Zendy; Y. Blumenfeld | Zendy; B. A. Brown | Zendy; T. Glasmacher | Zendy; P.G. Hansen | Zendy; R. W. Ibbotson | Zendy; P. A. Lofy | Zendy; V. Maddalena | Zendy; Kenneth Miller | Zendy; T. Nakamura | Zendy; B. Pritychenko | Zendy; B. M. Sherrill | Zendy; E. J. Spears | Zendy; M. Steiner | Zendy; J. A. Tostevin | Zendy; J. Yurkon | Zendy; A. Wagner | Zendy

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Direct Evidence for the Breakdown of theN=8Shell Closure inB12

Author(s) -

A. Navin,

D. W. Anthony,

T. Aumann,

T. Baumann,

D. Bazin,

Y. Blumenfeld,

B. A. Brown,

T. Glasmacher,

P.G. Hansen,

R. W. Ibbotson,

P. A. Lofy,

V. Maddalena,

Kenneth Miller,

T. Nakamura,

B. Pritychenko,

B. M. Sherrill,

E. J. Spears,

M. Steiner,

J. A. Tostevin,

J. Yurkon,

A. Wagner

Publication year - 2000

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.85.266

Subject(s) - neutron , physics , momentum (technical analysis) , nuclear physics , economics , finance

Partial cross sections and corresponding momentum distributions have been studied in the one-neutron knockout reaction ( 12Be,11Be+gamma) on a 9Be target at 78 MeV/nucleon. The resulting spectroscopic factors for the only two bound states of 11Be are 0.42+/-0.06 ( 1/2(+)) and 0.37+/-0.06 ( 1/2(-)), where the errors are experimental only. This result shows that N = 8 is not a good closed shell in the neutron-rich 12Be and that the last neutron pair is two-thirds in the ( 1s(2)+0d(2)) intruder configuration.

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