Evidence of soft dipole resonance in ^{11}li with isoscalar character.

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...

EVIDENCE FOR THE ISOSCALAR GIANT DIPOLE RESONANCE IN 208Pb

Polarization associated with the coupling to isoscalar dipole compression mode

The effect of core polarization on isoscalar dipole one-particle moments due to the coupling with isoscalar giant dipole resonance ~compression mode! is estimated. Numerical calculations with the core nucleus 82 Pb126 show that a small enhancement of one-particle moments is obtained, of which the magnitude depends sensitively on relevant one-particle orbitals. The results are important for a mi...

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 ...

Coupling of giant resonances to soft E 1 and E 2 modes in 8 B

The dynamic coupling between giant resonance states and “soft” low-energy excitation modes in weakly-bound nuclei is investigated. A coupled-channels calculation is reported for the reaction 8B + Pb → p + 7Be + Pb at 83 MeV/nucleon. It is shown that the low-energy response is only marginally modified by transitions to the isovector giant dipole and isoscalar giant quadrupole resonances.  2002 ...