Author/Authors :
S. Mosby، نويسنده , , N.S. Badger، نويسنده , , T. Baumann، نويسنده , , D. Bazin، نويسنده , , M. Bennett، نويسنده , , J. Brown، نويسنده , , G. Christian، نويسنده , , P.A. DeYoung، نويسنده , , J.E. Finck، نويسنده , , M. Gardner، نويسنده , , J.D. Hinnefeld، نويسنده , , E.A. Hook، نويسنده , , E.M. Lunderberg، نويسنده , , B. Luther، نويسنده , , D.A. Meyer، نويسنده , , M. Mosby، نويسنده , , G.F. Peaslee، نويسنده , , W.F. Rogers، نويسنده , , J.K. Smith، نويسنده , , J. Snyder، نويسنده , , A. Spyrou، نويسنده ,
Abstract :
A search for the neutron-unbound nucleus 21C was performed via the single-proton removal reaction from a beam of 22N at 68 MeV/u. Neutrons were detected with the Modular Neutron Array (MoNA) in coincidence with 20C fragments. No evidence for a low-lying state was found, and the reconstructed image decay-energy spectrum could be described with an s-wave line shape with a scattering length limit of image, consistent with shell-model predictions. A comparison with a renormalized zero-range three-body model suggests that 22C is bound by less than 70 keV.
Keywords :
J , ? , Goldhaber model with friction term , 21C deduced , non-existence of bound state , EnEn , NUCLEAR REACTIONS , E(20C fragment) , nC21) , ??) , measured , 21 , 22C calculated , View the MathML sourceC20+n deduced , double neutron halo nucleus low-lying levels , I(20C fragment , E=68 MeV/nucleonE=68 MeV/nucleon , In(?)In(?) , View the MathML sourceBe9(C22 , scattering length , spectrometric factor using shell model
