Isoscalar dipole excitations in O16

Isoscalar dipole mode in relativistic random phase approximation

The isoscalar giant dipole resonance structure in Pb is calculated in the framework of a fully consistent relativistic random phase approximation, based on effective mean-field Lagrangians with nonlinear meson self-interaction terms. The results are compared with recent experimental data and with calculations performed in the HartreeFock plus RPA framework. Two basic isoscalar dipole modes are ...

EVIDENCE FOR THE ISOSCALAR GIANT DIPOLE RESONANCE IN 208Pb

Configuration Mixing Effects in Isoscalar Giant Dipole Resonance

Based on an explicit verification of the coupling matrix elements between the 1p1h and 2p2h states we propose a new method of selecting the most important 2p2h states responsible for fragmentation effects. In this way the dimensionality of the problem is reduced, such that the computation becomes feasible and the spreading of the strength is realistic, as verified by some tests of convergence. ...

Probing the Isoscalar Excitations of C with Inelastic Alpha Scattering

The robust (spin and isospin zero) α-particle remains one of the best projectiles to probe the nuclear isoscalar excitations. In the present work, a microscopic folding model analysis of the α+C inelastic scattering to the 2 (4.44 MeV), 0 (7.65 MeV), 3 (9.64 MeV), 0 (10.3 MeV) and 1 (10.84 MeV) states in C has been performed using the 3-α resonating group method wave functions. The isoscalar tr...

The isoscalar giant dipole resonance: Where we stand?

The current status of the isoscalar giant dipole resonance (ISGDR) is reviewed. Over the past few years, experiments done with small-angle alpha scattering have provided the best evidence yet for this resonance and the experimental ISGDR strength distributions are reasonably well established in a number of nuclei. The implications of the experimental observations on the determination of the nuc...