Double giant dipole resonances in time-dependent density-matrix theory

Details Double giant dipole resonances in time-dependent density-matrix theory Double giant dipole resonances in time-dependent density-matrix theory

2000-03-15

arxiv.org/abs/nucl-th/0003034v2

Phys.Lett. B484 (2000) 231-235

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures

Scientific paper

10.1016/S0370-2693(00)00685-7

The strength functions of the DGDRs in 16O and 40Ca are calculated using an extended version of TDHF known as the time-dependent density-matrix theory (TDDM). The calculations are done in a self-consistent manner, in which the same Skyrme force as that used for the mean-field potential is used as the residual interaction to calculate two-body correlations. It is found that the DGDR in 16O has a large width due to the Landau damping, although the centroid energy of the DGDR is close to twice the energy of the GDR calculated in RPA. The DGDR in 40Ca is found more harmonic than that in 16O.

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