Shape coexistence in neutron-deficient krypton isotopes

Shape Coexistence in Light Krypton Isotopes

Shape coexistence in the neutron-deficient isotope

Neutron-deficient nuclei near the Z=82 closed shell exhibit the phenomenon of shape coexistence where the nucleus can take on oblate, prolate, and even spherical shapes at around the same excitation energy. The single-proton excitations in 187 Tl (with Z=81) can be used as a probe into the microscopic mechanisms behind this phenomenon. Previous studies of 187 Tl deduced the presence of coexisti...

Triaxiality and shape coexistence in Germanium isotopes

The ground-state deformations of the Ge isotopes are investigated in the framework of GognyHartree-Fock-Bogoliubov (HFB) and Skyrme Hartree-Fock plus pairing in the BCS approximation. Three different Skyrme parametrizations are used to explore the influence of different effective masses and spin-orbit models. There is generally good agreement for binding energies and deformations (total quadrup...

Shape evolution in neutron-rich osmium isotopes

N. Al-Dahan,1,2 P. H. Regan,2,* Zs. Podolyák,2 P. M. Walker,2 N. Alkhomashi,3 G. D. Dracoulis,4 G. Farrelly,2 J. Benlliure,5 S. B. Pietri,2,6 R. F. Casten,7 P. D. Stevenson,2 W. Gelletly,2 S. J. Steer,2 A. B. Garnsworthy,2,8 E. Casarejos,5,9 J. Gerl,6 H. J. Wollersheim,6 J. Grebosz,10 M. Górska,6 I. Kojouharov,6 H. Schaffner,6 A. Algora,11,12 G. Benzoni,13 A. Blazhev,14 P. Boutachkov,6 A. M. Br...

Shape mixing and β-decay properties of neutron-deficient Kr and Sr isotopes

Gamow-Teller strength distributions and β-decay half-lives in neutron-deficient Kr and Sr isotopes are investigated within a deformed quasiparticle random phase approximation. The approach is based on a self-consistent Skyrme Hartree-Fock mean field with pairing correlations and residual separable particle-hole and particle-particle forces. A simple two-level model is used to mix the nuclear sh...