The complete and incomplete fusion cross section as well as one-neutron stripping process of ^(6)Li+^(94)Zr system were measured at the energies around the Coulomb barrier by onlineγ-ray method.In addition to a 30%su...The complete and incomplete fusion cross section as well as one-neutron stripping process of ^(6)Li+^(94)Zr system were measured at the energies around the Coulomb barrier by onlineγ-ray method.In addition to a 30%suppression factor when compared with the measured total fusion process,the complete fusion cross section in ^(6)Li+^(94)Zr system was observed to be significantly lower than those in the nearby ^(6)Li+^(90,96)Zr system.The new experimental result implies that the coupling with breakup channel in the ^(6)Li-induced fusion processes can be affected by the inner structure of the target,which is still not clear in any available model calculation.For the one-neutron stripping process,the direct production cross sections for each level in 95Zr were extracted and compared with the coupled reaction channel calculation,offering a unique opportunity to examine the single-particle nature of the produced excited states.Given the fact that an overall overestimation of the production cross section for 954-keV and1618-keV levels was observed in the comparison,further investigation is highly demanded in order to understand the full reaction mechanism for the one-neutron stripping process induced by ^(6)Li.展开更多
The binding and proton separation energies of nuclides with Z,N=30-50 are investigated based on the shell model,with an uncertainty analysis via statistical methods.Several formulas are used to obtain the binding and ...The binding and proton separation energies of nuclides with Z,N=30-50 are investigated based on the shell model,with an uncertainty analysis via statistical methods.Several formulas are used to obtain the binding and proton separation energies according to shell-model calculations.The non-parametric bootstrap method is applied to establish an uncertainty decomposition and recomposition framework.Moreover,this is used to estimate the stability of proton(s) emission for each nuclide.Two formulas for calculating the binding energies with a systematic uncertainty of~0.3 Me V are proposed,and a reliable extrapolation ability is examined.These binding energy formulas deduce similar forms for their respective S_(p) and S_(2 p) energies,which predict the extension of the nuclear boundary of this region.A good description of the binding and proton separation energies is provided.The one-and twoproton separation energies and partial half-lives of proton emission are predicted,thus revealing a new dripline.Furthermore,there are 30 unstable nuclides predicted to be bound against proton(s)-emission.These nuclear properties will be useful in nuclear astrophysics.展开更多
基金supported by the National Nature Science Foundation of China(U2167204,11975040,1832130,12375130)the Director's Foundation of Department of Nuclear Physics,China Institute of Atomic Energy 12SZJJ-202305+4 种基金the partial support from financial agencies FAPERJ,CNPq,and INTC-FNA(Instituto Nacional de Ciência e Tecnologia-Física Nuclear e Aplica??es),research Project(464898/2014-5)supported by Guang dong Key Research And Development Program(2020B040420005)Guang dong Basic and Applied Basic Research Foundation(2021B1515120027)Ling Chuang Research Project of China National Nuclear Corporation(20221024000072F6-0002-7)Nuclear Energy Development and Research Project(HNKF202224(28))。
文摘The complete and incomplete fusion cross section as well as one-neutron stripping process of ^(6)Li+^(94)Zr system were measured at the energies around the Coulomb barrier by onlineγ-ray method.In addition to a 30%suppression factor when compared with the measured total fusion process,the complete fusion cross section in ^(6)Li+^(94)Zr system was observed to be significantly lower than those in the nearby ^(6)Li+^(90,96)Zr system.The new experimental result implies that the coupling with breakup channel in the ^(6)Li-induced fusion processes can be affected by the inner structure of the target,which is still not clear in any available model calculation.For the one-neutron stripping process,the direct production cross sections for each level in 95Zr were extracted and compared with the coupled reaction channel calculation,offering a unique opportunity to examine the single-particle nature of the produced excited states.Given the fact that an overall overestimation of the production cross section for 954-keV and1618-keV levels was observed in the comparison,further investigation is highly demanded in order to understand the full reaction mechanism for the one-neutron stripping process induced by ^(6)Li.
基金Supported by the National Natural Science Foundation of China (11775316,11825504,11961141004)the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong special support program (2016TQ03N575)the Guangdong Major Project of Basic and Applied Basic Research (2021B0301030006)。
文摘The binding and proton separation energies of nuclides with Z,N=30-50 are investigated based on the shell model,with an uncertainty analysis via statistical methods.Several formulas are used to obtain the binding and proton separation energies according to shell-model calculations.The non-parametric bootstrap method is applied to establish an uncertainty decomposition and recomposition framework.Moreover,this is used to estimate the stability of proton(s) emission for each nuclide.Two formulas for calculating the binding energies with a systematic uncertainty of~0.3 Me V are proposed,and a reliable extrapolation ability is examined.These binding energy formulas deduce similar forms for their respective S_(p) and S_(2 p) energies,which predict the extension of the nuclear boundary of this region.A good description of the binding and proton separation energies is provided.The one-and twoproton separation energies and partial half-lives of proton emission are predicted,thus revealing a new dripline.Furthermore,there are 30 unstable nuclides predicted to be bound against proton(s)-emission.These nuclear properties will be useful in nuclear astrophysics.