RIKEN Nuclear Physics Seminar
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Lecturer: Prof. Georgios Lalazissis 
		(Aristotle University of Thessaloniki, Greece)

Title:  Relativistic Hartree-Bogoliubov (RHB) description of nuclei close
	to the  particle drip lines

Date:   11/12/2001 (Mon.) 15:00 -

Place:  RIKEN Main Bldg. 1F Seminar Room

                           The seminar will be given in English.

Abstract:
Models based on the relativistic mean field approximation provide 
a microscopically consistent and yet simple and economical description 
of the many body nuclear problem. With very few adjsuted parameters
it has been possible to describe many nuclear structure phenomena, not only
in nuclei along the valley of $\beta$ -stability, but also in exotic nuclei
with extreme isospin values and close to the particle drip lines.

In this talk we will discuss ground state properties of neutron-rich
N $\approx$ 28 nuclei described in the framework of the Relativistic
Hartree Bogoliubov (RHB) theory, where the model predicts a strong
suppresion of the spherical shell gap at N=28 for very neutron rich nuclei. 
Next, we will apply the relativistic random phase approximation, 
in the analysis of the evolution of the isovector dipole response in nuclei
with a large neutron excess. The analyis reveals the dynamics of the dipole
pygmy resonances in medium heavy neutron rich nuclei.
We will also report on ground-state properties of very neutron rich light 
nuclei
with $4 \leq Z \leq 13$. We will compare our findings with very recent
experimental data.

In the proton rich side, we  will apply the theory to the description 
of the proton drip-line in the regions $31\leq Z \leq 49$, $51\leq Z\leq55$
The ground states properties (g.s deformations, one proton separation
energies,e.t.c) are studied at and beyond the proton drip. Excellent
agreement is found with recently discovered ground state proton emitters.
Finally, we will discuss the proton drip below Z=49, where the astrophysical
rapid proton capture process reaches the proton drip and has waiting points.
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        Contact persons of Nuclear Physics Seminar
        Y. Fukuyama, Y. Nishi, and T. Wakui (RI Beam Science Lab.)
        (email) seminar@rarfaxp.riken.go.jp 
	(FAX)   048-462-4689
        (WWW)   http://rarfaxp.riken.go.jp/~seminar/    
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