A. Escuderos

Shapes and beta decay in proton rich Ge, Se, Kr and Sr isotopes

Abstract We study ground states and β-decay properties of the proton rich isotope chains Ge, Se, Kr, and Sr. We use a deformed selfconsistent HF+RPA approach with density-dependent effective interactions of Skyrme type. We find that most of the isotopes present two HF minima corresponding to two different shapes. In addition to static quadrupole moments and other ground state band properties, we present results for Gamow Teller strength distributions, as well as for half-lives and summed strengths. The role of deformation is particularly emphasized.

β decay and shape isomerism in 74Kr

Abstract We study the properties of 74 Kr, and particularly the Gamow-Teller strength distribution, using a deformed self-consistent HF+RPA method with Skyrme type interactions. Results are presented for two density-dependent effective two-body interactions, including the dependence on deformation of the HF energy that exhibits two minima at close energies and distant deformations, one prolate and one oblate. We study the role of deformation, residual interaction, pairing and RPA correlations on the Gamow-Teller strength distribution. Results on moments of inertia and gyromagnetic factors, as well as on E0 and M1 transitions are also presented.

Spin-isospin excitations and beta(+)/EC half-lives of medium-mass deformed nuclei

Abstract A selfconsistent approach based on a deformed HF + BCS + QRPA method with density-dependent Skyrme forces is used to describe β + -decay properties in even–even deformed proton-rich nuclei. Residual spin–isospin forces are included in the particle–hole and particle–particle channels. The quasiparticle basis contains neutron–neutron and proton–proton pairing correlations in the BCS approach, while neutron–proton pairing interaction is treated as a residual force in QRPA. We discuss the sensitivity of Gamow–Teller strength distributions and β + / EC half-lives to deformation, pairing and the strength of the particle–particle interaction. The dependence on deformation is also compared to that of spin M1 strength distributions.

Relativistic mean field approximation to the analysis of 16 O ( e , e ′ p ) 15 N data at | Q 2 | 0.4 ( GeV / c ) 2

We use the relativistic distorted wave impulse approximation to analyze data on 16 O(e,ep) 15 N at |Q 2 | ≤ 0.4 (GeV/c) 2 that were obtained by differ- ent groups and seemed controversial. Results for differential cross-sections, response functions and ATL asymmetry are discussed and compared to dif- ferent sets of experimental data for proton knockout from p1/2 and p3/2 shells in 16 O. We compare with a nonrelativistic approach to better identify rel- ativistic effects. The present relativistic approach is found to accommodate most of the discrepancy between data from different groups, smoothing a long standing controversy.

Two neutrino double- β decay in deformed nuclei with an angular momentum projected basis

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Description of collective magnetic states within a spherical single particle basis

-decay properties of proton-rich odd-

A deformed approach to β+ decay of proton rich nuclei

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Signatures of relativistic nuclear dynamics in (e,e′p) reactions

and even-even krypton isotopes are studied in the framework of a deformed self-consistent Hartree-Fock calculation with density-dependent Skyrme forces, including pairing correlations between like nucleons in BCS approximation. Residual spin-isospin interactions are consistently included in the particle-hole and particle-particle channels and treated in the quasiparticle random phase approximation. The similarities and differences in the treatment of even-even and odd-

Expressions for the number of J = 0 pairs in even-even Ti isotopes

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