A common optical potential for 4He＋12C at intermediate bombarding energies, which is essential in analyzing exotic nuclei with 4He clusters, is obtained based on the Sao Paulo potential. Among systematic optical pote...A common optical potential for 4He＋12C at intermediate bombarding energies, which is essential in analyzing exotic nuclei with 4He clusters, is obtained based on the Sao Paulo potential. Among systematic optical potentials for 4He＋12 C, this potential has the merit of using a fixed imaginary part of the Woods Saxon form. By optical- model calculations, this potential reproduces the experimental elastic scattering angular distributions of a He＋12 C well within the energy range of 26A 60A MeV. It is also applied successfully in calculations of the breakup reactions of 6Li＋12 C and 6He＋12 C with a three-body continuum discretized coupled-channel method.展开更多
The two-body （core＋2n） cluster structure was implemented to describe the two-neutron halo nucleus 14Be, where the core 12Be was assumed inert and at a ground state and the dineutron was assumed at a pure 2So state....The two-body （core＋2n） cluster structure was implemented to describe the two-neutron halo nucleus 14Be, where the core 12Be was assumed inert and at a ground state and the dineutron was assumed at a pure 2So state. Based on such a structure the three-body continuum-discretized coupled-channel （CDCC） calculation was successfully used to deal with the 14Be breakup reactions of 14Be＋Pb at 35 MeV/u. Consequently, we modeled the kinematically complete measurement experiment of this reaction with the helpof Geant4. With the simulation data the relative energy spectrum was constructed by the invariant mass method and B（E1） spectrum was extracted using the virtual photon model. The influence of the target thickness and detector performance on the energy spectroscopy was investigated.展开更多
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
基金Supported by the National Natural Science Foundation of China under Grant No 11205036the Fundamental Research Funds for the Central Universities of China under Grant No HEUCF101501
文摘A common optical potential for 4He＋12C at intermediate bombarding energies, which is essential in analyzing exotic nuclei with 4He clusters, is obtained based on the Sao Paulo potential. Among systematic optical potentials for 4He＋12 C, this potential has the merit of using a fixed imaginary part of the Woods Saxon form. By optical- model calculations, this potential reproduces the experimental elastic scattering angular distributions of a He＋12 C well within the energy range of 26A 60A MeV. It is also applied successfully in calculations of the breakup reactions of 6Li＋12 C and 6He＋12 C with a three-body continuum discretized coupled-channel method.
基金Supported by National Natural Science Foundation of China(11205036)
文摘The two-body （core＋2n） cluster structure was implemented to describe the two-neutron halo nucleus 14Be, where the core 12Be was assumed inert and at a ground state and the dineutron was assumed at a pure 2So state. Based on such a structure the three-body continuum-discretized coupled-channel （CDCC） calculation was successfully used to deal with the 14Be breakup reactions of 14Be＋Pb at 35 MeV/u. Consequently, we modeled the kinematically complete measurement experiment of this reaction with the helpof Geant4. With the simulation data the relative energy spectrum was constructed by the invariant mass method and B（E1） spectrum was extracted using the virtual photon model. The influence of the target thickness and detector performance on the energy spectroscopy was investigated.
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.
