Neutron knockout of 12Be populating neutron-unbound states in 11Be

Details Neutron knockout of 12Be populating neutron-unbound states in 11Be Neutron knockout of 12Be populating neutron-unbound states in 11Be

2011-04-01

arxiv.org/abs/1104.0255v2

Phys.Rev.C83:057304,2011

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 2 figures \pacs{29.38.Db, 29.30.Hs, 24.50.+g, 21.10.Pc, 21.10.Hw, 27.20.+n} \keywords{neutron decay spectroscopy, neu

Scientific paper

10.1103/PhysRevC.83.057304

Neutron-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.

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