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28 March 2024
 
  » arxiv » 1104.0255

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Neutron knockout of 12Be populating neutron-unbound states in 11Be
William A. Peters ; T. Baumann ; B. A. Brown ; J. Brown ; P. A. DeYoung ; J. E. Finck ; N. Frank ; K. L. Jones ; J.-L. Lecouey ; B. Luther ; G. F. Peaslee ; W. F. Rogers ; A. Schiller ; M. Thoennessen ; J. A. Tostevin ; K. Yoneda ;
Date 1 Apr 2011
AbstractNeutron-unbound resonant states of 11Be were populated in neutron knock-out reactions from 12Be and identified by 10Be-n coincidence measurements. A resonance in the decay-energy spectrum at 80(2) keV was attributed to a highly excited unbound state in 11Be at 3.949(2) MeV decaying to the 2+ excited state in 10Be. A knockout cross section of 15(3) mb was inferred for this 3.949(2) MeV state suggesting a spectroscopic factor near unity for this 0p3/2- level, consistent with the detailed shell model calculations.
Source arXiv, 1104.0255
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