We measured the^(19)O+^(12)C fusion excitation function using the MATE active-target TPC at IMP for 9.7≤Ec.m.≤16.9 MeV.The results agree well with DC-TDHF and TDHF predictions,demonstrating the importance of dynamic...We measured the^(19)O+^(12)C fusion excitation function using the MATE active-target TPC at IMP for 9.7≤Ec.m.≤16.9 MeV.The results agree well with DC-TDHF and TDHF predictions,demonstrating the importance of dynamical effects near the barrier,but disagree with earlier MUSIC-based measurements.The^(19)O+^(12)C system exhibits a maximum fusion cross section consistent with those ofβ-stable O+C systems.A linear dependence of 1/E_(cr) and closest-approach distance on oxygen mass number is observed for^(17,18,19)O+^(12)C,indicating that additional valence neutrons lower the critical energy.V-shaped excitation structures appear for^(17)O and^(19)O,and the anomalous suppression previously reported for^(17)O calls for further experimental and theoretical study.展开更多
基金Supported by National Key Research and Development program(MOST 2022YFA1602304)the National Natural Science Foundation of China(12335009,U1632142,12505146).
文摘We measured the^(19)O+^(12)C fusion excitation function using the MATE active-target TPC at IMP for 9.7≤Ec.m.≤16.9 MeV.The results agree well with DC-TDHF and TDHF predictions,demonstrating the importance of dynamical effects near the barrier,but disagree with earlier MUSIC-based measurements.The^(19)O+^(12)C system exhibits a maximum fusion cross section consistent with those ofβ-stable O+C systems.A linear dependence of 1/E_(cr) and closest-approach distance on oxygen mass number is observed for^(17,18,19)O+^(12)C,indicating that additional valence neutrons lower the critical energy.V-shaped excitation structures appear for^(17)O and^(19)O,and the anomalous suppression previously reported for^(17)O calls for further experimental and theoretical study.
