Pairing effects on the collectivity of quadrupole states around 32Mg

Abstract

The first 2+ states in N=20 isotones including neutron-rich nuclei 32Mg and 30Ne are studied by the Hartree-Fock-Bogoliubov plus quasiparticle random phase approximation method based on the Green's function approach. The residual interaction between the quasiparticles is consistently derived from the hamiltonian density of Skyrme interactions with explicit velocity dependence. The B(E2) transition probabilities and the excitation energies of the first 2+ states are well described within a single framework. We conclude that pairing effects account largely for the anomalously large B(E2) value and the very low excitation energy in 32Mg.

14 pages, 9 figures

References in corpus (13)

• Shape Coexistence and the Effective Nucleon-Nucleon Interaction
• Odd-Even Staggering of Nuclear Masses: Pairing or Shape Effect?
• Correlations beyond the mean field in Magnesium isotopes: Angular momentum projection and configuration mixing
• Continuum Linear Response in Coordinate Space Hartree-Fock-Bogoliubov Formalism for Collective Excitations in Drip-line Nuclei
• Superdeformed rotational bands in the Mercury region; A Cranked Skyrme-Hartree-Fock-Bogoliubov study
• Deformation of Nuclei Close to the Two-Neutron Drip Line in Mg Region
• Continuum quasiparticle random phase approximation and the time dependent Hartree-Fock-Bogoliubov approach
• Symmetry-Unrestricted Skyrme-Hartree-Fock-Bogoliubov Calculations for Exotic Shapes in N=Z Nuclei from 64Ge to 84Mo
• Quadrupole deformations of neutron-drip-line nuclei studied within the Skyrme Hartree-Fock-Bogolyubov approach
• Shell model studies of neutron rich nuclei
• Light Nuclei near Neutron and Proton Drip Lines in the Relativistic Mean-Field Theory
• Kinetic energy and spin-orbit splitting in nuclei near neutron drip line
• Quadrupole collectivity of neutron-rich Neon isotopes

Cited by in corpus (35)

• Exotic modes of excitation in atomic nuclei far from stability
• Self-Consistent Description of Multipole Strength in Exotic Nuclei I: Method
• Di-neutron correlation and soft dipole excitation in medium mass neutron-rich nuclei near drip-line
• Large-angle scattering and quasi-elastic barrier distributions
• Ab initio multi-shell valence-space Hamiltonians and the island of inversion
• Determination of the structure of ${}^{31}$Ne by full-microscopic framework
• Deformed quasiparticle-random-phase approximation for neutron-rich nuclei using the Skyrme energy density functional
• Deformation of Ne isotopes in the island-of-inversion region
• Shape coexistence near the neutron number N=20: First identification of the E0 decay from the deformed 0^+_2 state in 30Mg
• Deformation effect on total reaction cross sections for neutron-rich Ne-isotopes
• "Safe" Coulomb Excitation of 30Mg
• Self-consistent Skyrme QRPA for use in axially-symmetric nuclei of arbitrary mass
• Linear response of light deformed nuclei investigated by self-consistent quasiparticle random-phase-approximation
• Shape fluctuations in the ground and excited 0+ states of 30Mg and 32Mg
• The intruder feature of 31Mg and the coexistence of many particle and many hole states
• Tensor effects on gap evolution of N=40 from non-relativistic and relativistic mean-field theory
• Collective multipole excitations based on correlated realistic nucleon-nucleon interactions
• Linear Responses in Time-dependent Hartree-Fock-Bogoliubov Method with Gogny Interaction
• Application of Gaussian expansion method to nuclear mean-field calculations with deformation
• Magicity and occurrence of band with enhanced B(E2) in neutron-rich nuclei 68Ni and 90Zr
• Unveiling pairing anti-halo effect in odd-even staggering in reaction cross sections of weakly bound nuclei
• Mixed Representation RPA Calculation for Octupole Excitations on Superdeformed Sates in the 40Ca and Neutron-Rich Sulfur Regions
• Continuum quasiparticle linear response theory using the Skyrme functional for multipole responses of exotic nuclei
• Shell evolution and its indication on the isospin dependence of the spin-orbit splitting
• Pairing and continuum effects on low-frequency quadrupole vibrations in deformed Mg isotopes close to the neutron drip line
• Pygmy dipole mode in deformed neutron-rich Mg isotopes close to the drip line
• Properties of exotic nuclei and their linkage to the nucleonic interaction
• Low-frequency $K^{\pi }=0^{+}$ modes in deformed neutron-rich nuclei: Pairing- and $\beta$-vibrational modes of neutron
• Core polarization for the electric quadrupole moment of neutron-rich Aluminum isotopes
• Skyrme-QRPA calculations for low-lying excitation modes in deformed neutron-rich nuclei
• Low-lying 2${}^{+}$ states generated by $pn$-quadrupole correlation and $N=28$ shell quenching
• Pairing in spherical nuclei: quasi-particle random phase approximation calculations with the Gogny interaction
• Dynamic Pairing Effects on Low-Frequency Modes of Excitation in Deformed Mg Isotopes close to the Neutron Drip Line
• Pairing correlations in exotic nuclei
• Ab initio study in the island of inversion within the two-major-shell valence space