Speaker
Dr
Rashid Nazmitdinov
(BLTP, JINR< Dubna)
Description
The statistical properties of the $1^-$ spectrum in energy interval
9.5-18.5 MeV for $^{206}$Hg, $^{204,206,208}$Pb and $^{210}$Po nuclei are
analysed thoroughly within the microscopic approach and the Random Matrix
Theory. The microscopic approach is based on the mean field, simulated by
means of the Skyrme interaction SLy4 and the volume pairing interaction,
treated in the BCS approximation. The quasiparticle random phase
approximation and the coupling between one- and two-phonon states are used
to generate excited states. The comparison of the results, obtained with
the aid of the coupling calculated microscopically and by means of the
Gaussian random distribution, demonstrates a close similarity in the
description of the spreading widths of the Isovector Dipole Giant
Resonanse of the
considered nuclei. Furthermore, a good agreement is obtained with the
microscopic description of the decay widths if the random distribution is
used for the coupling between microscopic one-phonon states and two-phonon
states that are also generated by the Gaussian Orthogonal Ensembles
distribution.
Primary author
Dr
Rashid Nazmitdinov
(BLTP, JINR< Dubna)
