The role of configuration mixing in the Pt region is investigated. The nature of the ground state changes smoothly, being spherical around mass A ∼ 174 and A ∼ 192 and deformed around the mid-shell N = 104 region. Interacting Boson Model with configuration mixing calculations are presented for deformations and isotope shifts. The assumption of the existence of two configurations with very diffe...

We discuss the nonmesonic decay of deformed p-shell hypernuclei. The Nilsson model with angular momentum projection is employed in order to take into account the deformation effects. The nonmesonic decay rate decreases as a function of the deformation parameter, while the ratio of the neutronto proton-induced decay rates and the intrinsic Λ asymmetry parameter increase. We find that the deforma...

The presence of not yet detected intruder states in Be, e.g., a J52 intruder at 9 MeV excitation would affect the shape of the b-delayed a spectra of Li and B. In order to test the plausibility of this assumption, shell-model calculations with up to 4\v excitations in Be ~and up to 2\v excitations in Be! were performed. With the above restrictions on the model spaces, the calculations did not y...

The nucleon-pair shell model (NPSM) within the framework of a broken symmetry basis is studied. results demonstrate validity such scheme, which in turn leads to significant reduction dimensionality multi-pair configuration space. Specifically, case an axially-deformed basis, yield satisfactory description low-lying spectrum, even without need for applying projection procedure. In triaxially-def...

Angular-momentum-projected energy surface calculations for A ≈ 110 nuclei indicate three distinct energy minima occurring at different angular-momenta. These correspond to normal, super-, and hyper-deformed shapes coexisting in one nucleus. Pd is studied in detail, with a quantitative prediction on superand hyperdeformed spectra by the Projected Shell Model calculation. It is suggested that sev...

Isomeric states in the nuclei along the rapid proton capture process path are studied by the projected shell model. Emphasis is given to two waiting point nuclei 68Se and 72Kr that are characterized by shape coexistence. Energy surface calculations indicate that the ground state of these nuclei corresponds to an oblate-deformed minimum, while the lowest state at the prolatedeformed minimum can ...

We describe the generators of κ-conformal transformations, leaving invariant the κ-deformed d’Alembert equation. In such a way one obtains the conformal extension of the off-shell spin zero realization of κ-deformed Poincaré algebra. Finally the algebraic structure of κ-deformed conformal algebra is discussed. The paper is dedicated to the memory of Professor Jan Rzewuski and will appear in the...

Damping of collective rotational motion in A ∼ 190 and A ∼ 150 superdeformed nuclei is studied by means of the cranked shell model with two-body residual force. Numerical calculations predict that in a typical A ∼ 190 superdeformed nucleus, Hg, the rotational damping width is significantly small, Γrot ∼ 30 keV, and that the number of superdeformed bands in the off-yrast region amounts up to 150...

The rotational behavior of T=0 and T=1 bands in the odd-oddN=Z nucleus Ga is studied theoretically using the spherical shell model (laboratory frame) and the cranked Nilsson-Strutinsky model (intrinsic frame). Both models give a good description of available experimental data. The role of isoscalar and isovector pairing in the T=0 and T=1 bands as functions of angular momentum is studied in the...