The decay of the 21.47-MeV stretched resonance in 13C: A precise probe of the open nuclear quantum system description

The decay of the 21.47-MeV stretched resonance in 13C, arising from p3/2→d5/2 nucleon excitation coupled to maximum spin, was investigated a (p,p′) experiment at 135 MeV proton bombarding energy, performed Cyclotron Centre Bronowice (CCB) IFJ PAN Krakow. First experimental information on and neutron branches this state obtained by using coincidence measurement protons inelastically scattered 13C target γ rays daughter nuclei, namely, 12B (proton decay) 12C (neutron decay). main lead Jπ=2+, first-excited 0.953 12B, Jπ=1+, T=1 level 15.110 12C. results were compared with predictions Gamow Shell Model (GSM), which used describe terms its width, electromagnetic transition strengths pattern. A very good agreement between measured calculated properties demonstrating high-quality precision GSM wave function calculations, include coupling resonant non-resonant particle continuum.