Self-consistent Skyrme quasiparticle random-phase approximation for use in axially symmetric nuclei of arbitrary mass
نویسندگان
چکیده
We describe a new implementation of the quasiparticle random-phase approximation (QRPA) in axially symmetric deformed nuclei with Skyrme and volume-pairing energy-density functionals. After using a variety of tests to demonstrate the accuracy of the code in 24,26Mg and 16O, we report the first fully self-consistent application of the Skyrme QRPA to a heavy deformed nucleus, calculating strength distributions for several K in 172Yb. We present energy-weighted sums, properties of γ -vibrational and low-energy K = 0+ states, and the complete isovector E1 strength function. The QRPA calculation reproduces the properties of the low-lying 2+ states as well or better than it typically does in spherical nuclei.
منابع مشابه
Large - scale calculations of the double - β decay of 76 Ge , 130 Te , 136 Xe , and 150 Nd in the deformed self - consistent Skyrme quasiparticle random - phase approximation
We use the axially deformed Skyrme quasiparticle random-phase approximation (QRPA) together with the SkM∗ energy-density functional, both as originally presented and with the time-odd part adjusted to reproduce the Gamow-Teller resonance energy in 208Pb, to calculate the matrix elements that govern the neutrinoless double-β decay of 76Ge, 130Te, 136Xe, and 150Nd. Our matrix elements in 130Te an...
متن کاملTesting Skyrme energy-density functionals with the quasiparticle random-phase approximation in low-lying vibrational states of rare-earth nuclei
Although nuclear energy-density functionals are determined primarily by fitting to ground-state properties, they are often applied in nuclear astrophysics to excited states, usually through the quasiparticle random-phase approximation (QRPA). Here we test the Skyrme functionals SkM∗ and SLy4 along with the self-consistent QRPA by calculating properties of low-lying vibrational states in a large...
متن کاملStellar weak decay rates in neutron-deficient medium-mass nuclei
Weak decay rates under stellar density and temperature conditions holding at the rapid proton-capture process are studied in neutron-deficient medium-mass waiting-point nuclei extending from Ni up to Sn. Neighboring isotopes to these waiting-point nuclei are also included in the analysis. The nuclear structure part of the problem is described within a deformed Skyrme Hartree-Fock + BCS + quasip...
متن کاملSystematics of the first 2+ excitation in spherical nuclei with the Skryme quasiparticle random-phase approximation
We use the quasiparticle random-phase approximation (QRPA) and the Skyrme interactions SLy4 and SkM∗ to systematically calculate energies and transition strengths for the lowest 2+ state in spherical even-even nuclei. The SkM∗ functional, applied to 178 spherical nuclei between Z = 10 and 90, produces excitation energies that are on average 11% higher than experimental values, with residuals th...
متن کامل0 On dipole compression modes in nuclei
Isoscalar dipole strength distributions in spherical medium-and heavy-mass nuclei are calculated within random phase approximation (RPA) or quasiparticle RPA. Different Skyrme-type interactions corresponding to incompressibilities in the range 200-250 MeV are used. The results are discussed in comparison with existing data on isoscalar giant dipole resonances. Two main issues are raised, firstl...
متن کامل