High-spin yrast structures of even-even superheavy nuclei 254-25SRf are investigated by means of total- Routhian-surface approach in three-dimensional （f12, 7, f14） space. The behavior in the moments of inertia of 2...High-spin yrast structures of even-even superheavy nuclei 254-25SRf are investigated by means of total- Routhian-surface approach in three-dimensional （f12, 7, f14） space. The behavior in the moments of inertia of 256Rf is well reproduced by our calculations, which is attributed to the J15/2 neutron rotation-alignment. The competition between the rotationally aligned ila/2 proton and j15/2 neutron may occur to a large extent in 256Rf. High-spin predictions are also made for its neighboring isotopes 254＇2ssRf, showing that the alignment of the j15/2 neutron pair is more favored than that of the i13/2 proton pair.展开更多
In this study,the evolution of nuclear shape and rotational behavior along the yrast line in even-even^(126-136)was systematically investigated using pairing self-consistent Woods-Saxon-Strutinsky calculations combine...In this study,the evolution of nuclear shape and rotational behavior along the yrast line in even-even^(126-136)was systematically investigated using pairing self-consistent Woods-Saxon-Strutinsky calculations combined with the total Routhian surface(TRS)method in the(β_(2),γ,β_(4))deformation space.Empirical laws were applied to evaluate nuclear ground-state properties,revealing a shape evolution from axially deformed to non-axial vibrational configuration in even-even isotopes.Particularly,an extremeγ-unstable shape was predicted in.The shape transition of the ground state in these nuclei was confirmed by the TRS calculations.In addition,the evolution of the nuclear shape in high spin states with varying rotational axes associated with rotation around the medium,long,and short axes was elucidated from the TRS calculations.This variation was further characterized by the alignment of theπ(h_(11/2))^(2)and v(h11/2)^(2)configurations,highlighting a preference for non-collective oblate/triaxial shapes withγ>0°and collective oblate/triaxial shapes withγ<0°,espectively.展开更多
Multi-quasiparticle states and rotational bands in neutron-rich erbium isotopes have been investigated by the configuration- constrained pairing-deformation-frequency self-consistent total-Routhian-surface （TRS） met...Multi-quasiparticle states and rotational bands in neutron-rich erbium isotopes have been investigated by the configuration- constrained pairing-deformation-frequency self-consistent total-Routhian-surface （TRS） method with particle-number-conserved pairing. Specifically, the recently observed Kπ = 4- bands in 168,170,172Er have been found to experience a configuration change in our calculation. Some other multi-quasiparticle states with uncertain configuration assignments have been reinvestigated by calculating their collective rotations. The configuration-constrained TRS calculation can reproduce experimental data consistently.展开更多
The properties of γ instability in rapidly rotating even-even132-138 Nd isotopes have been investigated using the pairing-deformation self-consistent total-Routhian-surface calculations in a deformation space of（β...The properties of γ instability in rapidly rotating even-even132-138 Nd isotopes have been investigated using the pairing-deformation self-consistent total-Routhian-surface calculations in a deformation space of（β2, γ,β4）. It is found that even-even134-138 Nd nuclei exhibit triaxiality in both ground and excited states, even up to high-spin states. The lightest isotope possesses a well-deformed prolate shape without a γ deformation component.The current numerical results are compared with previous calculations and available observables such as quadrupole deformation β2 and the feature of γ-band levels, showing basically a general agreement with the observed trend ofγ correlations（e.g. the pattern of the odd-even energy staggering of the γ band）. The existing differences between theory and experiment are analyzed and discussed briefly.展开更多
基金Supported by National Natural Science Foundation of China(10805040,11175217)Foundation and Advanced Technology Research Program of Henan Province(132300410125)S&T Research Key Program of Henan Province Education Department(13A140667)
文摘High-spin yrast structures of even-even superheavy nuclei 254-25SRf are investigated by means of total- Routhian-surface approach in three-dimensional （f12, 7, f14） space. The behavior in the moments of inertia of 256Rf is well reproduced by our calculations, which is attributed to the J15/2 neutron rotation-alignment. The competition between the rotationally aligned ila/2 proton and j15/2 neutron may occur to a large extent in 256Rf. High-spin predictions are also made for its neighboring isotopes 254＇2ssRf, showing that the alignment of the j15/2 neutron pair is more favored than that of the i13/2 proton pair.
基金Supported by the National Natural Science Foundation of China(12275115,11975209,12175097)Natural Science Foundation of Henan(252300421478)。
文摘In this study,the evolution of nuclear shape and rotational behavior along the yrast line in even-even^(126-136)was systematically investigated using pairing self-consistent Woods-Saxon-Strutinsky calculations combined with the total Routhian surface(TRS)method in the(β_(2),γ,β_(4))deformation space.Empirical laws were applied to evaluate nuclear ground-state properties,revealing a shape evolution from axially deformed to non-axial vibrational configuration in even-even isotopes.Particularly,an extremeγ-unstable shape was predicted in.The shape transition of the ground state in these nuclei was confirmed by the TRS calculations.In addition,the evolution of the nuclear shape in high spin states with varying rotational axes associated with rotation around the medium,long,and short axes was elucidated from the TRS calculations.This variation was further characterized by the alignment of theπ(h_(11/2))^(2)and v(h11/2)^(2)configurations,highlighting a preference for non-collective oblate/triaxial shapes withγ>0°and collective oblate/triaxial shapes withγ<0°,espectively.
基金the National Key Basic Research Program of China (Grant No. 2013CB834400)the National Natural Science Foundation of China (Grant No. 11235001)
文摘Multi-quasiparticle states and rotational bands in neutron-rich erbium isotopes have been investigated by the configuration- constrained pairing-deformation-frequency self-consistent total-Routhian-surface （TRS） method with particle-number-conserved pairing. Specifically, the recently observed Kπ = 4- bands in 168,170,172Er have been found to experience a configuration change in our calculation. Some other multi-quasiparticle states with uncertain configuration assignments have been reinvestigated by calculating their collective rotations. The configuration-constrained TRS calculation can reproduce experimental data consistently.
基金Supported by National Natural Science Foundation of China(10805040,11175217)Foundation and Advanced Technology Research Program of Henan Province(132300410125)S&T Research Key Program of Henan Province Education Department(13A140667)
文摘The properties of γ instability in rapidly rotating even-even132-138 Nd isotopes have been investigated using the pairing-deformation self-consistent total-Routhian-surface calculations in a deformation space of（β2, γ,β4）. It is found that even-even134-138 Nd nuclei exhibit triaxiality in both ground and excited states, even up to high-spin states. The lightest isotope possesses a well-deformed prolate shape without a γ deformation component.The current numerical results are compared with previous calculations and available observables such as quadrupole deformation β2 and the feature of γ-band levels, showing basically a general agreement with the observed trend ofγ correlations（e.g. the pattern of the odd-even energy staggering of the γ band）. The existing differences between theory and experiment are analyzed and discussed briefly.
