Two low-lying unbound states in ^(16)C are investigated by deuteron inelastic scattering in inverse kinematics.Besides the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at ...Two low-lying unbound states in ^(16)C are investigated by deuteron inelastic scattering in inverse kinematics.Besides the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at 6.89 MeV is observed for the first time.The inelastic scattering angular distributions of these two states are well reproduced by the distorted-wave Born approximation(DWBA)calculation with an l=1 excitation.In addition,the spinparities of the unbound states are discussed and tentatively assigned based on shell model calculations using the modified YSOX interaction.展开更多
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 the National Key R&D Program of China(2018YFA0404403)the National Natural Science Foundation of China(11775004,U1867214,11875074,11961141003)+1 种基金the funding from the State Key Laboratory of Nuclear Physics and Technology,Peking University(NPT2021ZZ01)the funding from Heavy Ion Research Facility in Lanzhou(HIR2021PY002)。
文摘Two low-lying unbound states in ^(16)C are investigated by deuteron inelastic scattering in inverse kinematics.Besides the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at 6.89 MeV is observed for the first time.The inelastic scattering angular distributions of these two states are well reproduced by the distorted-wave Born approximation(DWBA)calculation with an l=1 excitation.In addition,the spinparities of the unbound states are discussed and tentatively assigned based on shell model calculations using the modified YSOX interaction.
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.
