EuNPC2015

In general standard reaction theory combined with proper nuclear and Coulomb interactions lead to fair description of nuclear reaction cross sections. The situation is less satisfying for reactions in the resonance regime because there is no proper method available to determine the positions and widths of resonances. Hence the resonance region is usually described via R-matrix theory which...

A simple exactly separable model for the competition between the γ-rigid and γ-stable collective motion in the phase transition between spherical and deformed shapes is proposed. The coupling of the two types of β vibration is achieved by introducing a control parameter measuring the degree of the system’s γ-rigidity in an Ising type Hamiltonian. The separation of variables is achieved by...

Neutron-rich rare-earth nuclei around the maximum of collectivity are predicted to exist with an extremely stable intrinsic configuration in their ground-state structure. The present work explores the structure of the yrast bands in the neutron-rich nuclei 170Dy and 176Er, which have no previously known excited states. Nuclear states of 170Dy and 176Er were populated via the −2p + 2n and +6n...

The dipole response in neutron rich nuclei is investigated within the equations of motion phonon method (EMPM) [1]. The approach is fully self-consistent and makes direct use of the chiral potential, optimized up to-next-to-next leading order so as to minimize the effect of three-body forces [2]. Calculations in Hartree-Fock-Bogoliubov (HFB) plus Tamm-Dancoff (TDA) and random-phase (RPA)...

We explore the symmetry adapted Pairing-Plus-Quadrupole Model /PQM/ in the framework of the Elliott`s SU(3) Model, with the aim to obtain the complementary and competing features of the pairing and quadrupole interactions in the model Hamiltonian, containing both of them as limiting cases. We establish a correspondence between the SO(8) pairing basis and the Elliott's SU(3) basis, that...

The single- and multi-nucleon transfer reactions, namely, 206Pb(18O, x); x= 19O, 17O, 20O, 16O, 18N, 17N, 16N, 15N, 14N, 16C, 15C, 14C, 13C, 12C, 12B, 11B, 10B, 10Be and 9Be have been studied at an incident 18O energy of 139 MeV. Reaction channels involving transfer of up to nine nucleons have been detected. Total kinetic energy loss spectrum and angular distribution of cross sections have...

The common treatment of proton-neutron pairing in N ≅ Z nuclei relies on Cooper pairs and BCS-type models. However, the nuclear interaction can induce, through the isospin conservation, quartet correlations of alpha type which might compete with the Cooper pairs. In fact, for any isovector pairing interactions the ground state of N=Z systems is accurately described not by Cooper pairs but in...

Candidates for excited alpha-cluster states have been identified in many light nuclei being organized in rather simple quasi-molecular configurations [1]. For heavier nuclei the existence of these states remains an open question, though different experimental observables have been discussed as possible signatures. The electric dipole response of atomic nuclei is intimately connected to the...