Evidence for the ground-state resonance of 26O

E. Lunderberg , P.A. DeYoung , Z. Kohley , H. Attanayake , T. Baumann , D. Bazin , G. Christian , D. Divaratne

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S.M. Grimes A. Haagsma J.E. Finck N. Frank B. Luther S. Mosby T. Nagy G.F. Peaslee A. Schiller J. Snyder A. Spyrou M.J. Strongman M. Thoennessen

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classification ⚛️ nucl-ex

keywords evidenceneutronsagreesbeamcalculationscoincidencedeterminedfirst

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Evidence for the ground state of the neutron-unbound nucleus 26O was observed for the first time in the single proton-knockout reaction from a 82 MeV/u 27F beam. Neutrons were measured in coincidence with 24O fragments. 26O was determined to be unbound by 150+50-150 keV from the observation of low-energy neutrons. This result agrees with recent shell model calculations based on microscopic two- and three-nucleon forces.

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Evidence for the ground-state resonance of 26O

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