Author/Authors :
M. Thoennessen، نويسنده , , 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 , , E.A. Hook، نويسنده , , B. Luther، نويسنده , , D.A. Meyer، نويسنده , , M. Mosby، نويسنده , , W.F. Rogers، نويسنده , , J.K. Smith، نويسنده , , A. Spyrou، نويسنده , , M.J. Strongman، نويسنده ,
Abstract :
Proton removal reactions from a secondary 22N beam were utilized to populate unbound states in neutron-rich carbon isotopes. Neutrons were measured with the Modular Neutron Array (MoNA) in coincidence with carbon fragments. A resonance with a decay energy of 76(14) keV was observed in the system image corresponding to a state in 19C at an excitation energy of 653(95) keV. This resonance could correspond to the first image state which was recently speculated to be unbound in order to describe 1n and 2n removal cross section measurements from 20C.
Keywords :
(22N , ? using different shell models , ?3pn?18C) , J , ?2pn?19C) , ?pn?20C) , (22N , InIn , low-lying level scheme near neutron drip line , NUCLEAR REACTIONS , calculated , 76 keV resonance , measured , (carbon)n-coin , 9Be(22N , low-lying levels , E=68 MeV/nucleonE=68 MeV/nucleon , carbon fragments , 19C deduced , EnEn
