Seven experimentally observed bands of 155Tb are analyzed in detail,using the particle-number-conserving method for treating the cranked shell model with monopole and quadrupole pairing interactions.We satisfactorily ...Seven experimentally observed bands of 155Tb are analyzed in detail,using the particle-number-conserving method for treating the cranked shell model with monopole and quadrupole pairing interactions.We satisfactorily reproduce the experimental alignments and especially focus on the microscopic mechanism of the second back-bending and the influence of pair interaction on ultrahigh spins.Our calculated results show that the πi13/2 orbitals are too high to give a contribution to the moment of inertia below ω≈ 0.7 MeV.Instead,the crossing between the π[541]1/2 and other proton orbitals is responsible for the second back-bending.We assign a possible configuration to the decoupled band found in 155Tb and predict eleven bands which are experimentally unobserved.展开更多
In this study,the multi-quasiparticle triaxial projected shell model(TPSM)is applied to investigateγ-vibrational bands in transitional nuclei of 118-128Xe.We report that each triaxial intrinsic state has aγ-band bui...In this study,the multi-quasiparticle triaxial projected shell model(TPSM)is applied to investigateγ-vibrational bands in transitional nuclei of 118-128Xe.We report that each triaxial intrinsic state has aγ-band built on it.The TPSM approach is evaluated by the comparison of TPSM results with available experimental data,which shows a satisfactory agreement.The energy ratios,B(E2)transition rates,and signature splitting of theγ-vibrational band are calculated.展开更多
A variable moment of inertia(VMI)inspired interacting boson model(IBM),which includes many-body interactions and a perturbation possessing(5)(or(5))symmetry,is used to investigate the rotational bands of the mass regi...A variable moment of inertia(VMI)inspired interacting boson model(IBM),which includes many-body interactions and a perturbation possessing(5)(or(5))symmetry,is used to investigate the rotational bands of the mass region.A novel modification is introduced,extending the Arima coefficient to the third order.This study is dedicated to the quantitative analysis of evolving trends in intrabandγ-transition energy as well as the kinematic and dynamic moments of inertia(MoIs)within the rotational bands of ^(244)Pu and ^(248)Cm.The computed outcomes exhibit an exceptional degree of agreement with experimental observations across various conditions.The significance of including a higher-order Arima coefficient is further examined by contrasting it with the previously proposed model.The calculated results demonstrate the significance of both the anti-pairing and pairing effects in the evolution of the dynamic MoI.Additionally,these insights reveal the importance of a newly introduced parameter in accurately depicting complex nuclear behaviors,such as back-bending,up-bending,and downturn in the MoI.展开更多
基金Supported by National Natural Science Foundation of China (10675006)
文摘Seven experimentally observed bands of 155Tb are analyzed in detail,using the particle-number-conserving method for treating the cranked shell model with monopole and quadrupole pairing interactions.We satisfactorily reproduce the experimental alignments and especially focus on the microscopic mechanism of the second back-bending and the influence of pair interaction on ultrahigh spins.Our calculated results show that the πi13/2 orbitals are too high to give a contribution to the moment of inertia below ω≈ 0.7 MeV.Instead,the crossing between the π[541]1/2 and other proton orbitals is responsible for the second back-bending.We assign a possible configuration to the decoupled band found in 155Tb and predict eleven bands which are experimentally unobserved.
基金financial support from the Science and Engineering Research Board,under the project file no.CRG/2019/001231financial support from The Department of Science and Technology,Government of India,INSPIRE Fellowship under sanction no.DST/INSPIRE Fellowship/2018/IF180368。
文摘In this study,the multi-quasiparticle triaxial projected shell model(TPSM)is applied to investigateγ-vibrational bands in transitional nuclei of 118-128Xe.We report that each triaxial intrinsic state has aγ-band built on it.The TPSM approach is evaluated by the comparison of TPSM results with available experimental data,which shows a satisfactory agreement.The energy ratios,B(E2)transition rates,and signature splitting of theγ-vibrational band are calculated.
基金Supported by the the National Key R and D Program of China(2023YFA1606503)。
文摘A variable moment of inertia(VMI)inspired interacting boson model(IBM),which includes many-body interactions and a perturbation possessing(5)(or(5))symmetry,is used to investigate the rotational bands of the mass region.A novel modification is introduced,extending the Arima coefficient to the third order.This study is dedicated to the quantitative analysis of evolving trends in intrabandγ-transition energy as well as the kinematic and dynamic moments of inertia(MoIs)within the rotational bands of ^(244)Pu and ^(248)Cm.The computed outcomes exhibit an exceptional degree of agreement with experimental observations across various conditions.The significance of including a higher-order Arima coefficient is further examined by contrasting it with the previously proposed model.The calculated results demonstrate the significance of both the anti-pairing and pairing effects in the evolution of the dynamic MoI.Additionally,these insights reveal the importance of a newly introduced parameter in accurately depicting complex nuclear behaviors,such as back-bending,up-bending,and downturn in the MoI.
