Using a microscopic four-body cluster model,we investigate the spectral properties and structural configurations of the ioBe nucleus.We calculate physical quantities such as the root-mean-squared(r.m.s.)radii and elec...Using a microscopic four-body cluster model,we investigate the spectral properties and structural configurations of the ioBe nucleus.We calculate physical quantities such as the root-mean-squared(r.m.s.)radii and electromagnetic transition strengths.The theoretical results for the energies and certain electromagnetic transition strengths of the low-lying states show good agreement with experimental data.In particular,the enhancement of the r.m.s.radius and isoscalar monopole transition strength of the O,state indicates a well-developed cluster structure.We obtained three 1-states in Ex<15 MeV that show remarkable dipole transition strengths,suggesting that the 1-states may have cluster structure.Using the obtained wave functions,we calculate the reduced-width amplitudes(RWAs)to investigate the SHe+αand'Be+n two-body cluster structures in IOBe.The results suggest that the lowlying states show the two-body 6He+α and 9Be+n configuration,with the 6He+α components of the two-body structure diminishing as the energy increases,which due to the breakup of He and 9Be at higher excitation energies.Moreover,a few states above the α+α+n+n threshold still exhibit significant 9Be+n components.展开更多
文摘Using a microscopic four-body cluster model,we investigate the spectral properties and structural configurations of the ioBe nucleus.We calculate physical quantities such as the root-mean-squared(r.m.s.)radii and electromagnetic transition strengths.The theoretical results for the energies and certain electromagnetic transition strengths of the low-lying states show good agreement with experimental data.In particular,the enhancement of the r.m.s.radius and isoscalar monopole transition strength of the O,state indicates a well-developed cluster structure.We obtained three 1-states in Ex<15 MeV that show remarkable dipole transition strengths,suggesting that the 1-states may have cluster structure.Using the obtained wave functions,we calculate the reduced-width amplitudes(RWAs)to investigate the SHe+αand'Be+n two-body cluster structures in IOBe.The results suggest that the lowlying states show the two-body 6He+α and 9Be+n configuration,with the 6He+α components of the two-body structure diminishing as the energy increases,which due to the breakup of He and 9Be at higher excitation energies.Moreover,a few states above the α+α+n+n threshold still exhibit significant 9Be+n components.
