This is an announcement of NT-Hongo-CNS seminar on July 21, 2015 (Tue.).
Date: July 21, 2015 (Tue.) 16:30 - 18:30
Place: Room 446, Faculty of Science Building 1, Hongo, The University of
Lecturer: Prof. Anatoli Afanasjev
Institution: Mississippi State University
Title: The extremes of nuclear landscape in density functional theory

This seminar is hosted by Hongo nuclear theory group (NT-Hongo) and CNS,
and supported by a Grant-in-Aid for Scientific Research (23244049) from
Contact person: Takaharu Otsuka, Noritaka Shimizu and Yusuke Tsunoda

Abstract: Density functional theory is one of few theoretical approaches
which allows to describe the nuclei across full nuclear landscape. I will
base my talk on the results obtained in covariant density functional theory
(CDFT) which is a modern theoretical tool for the description of low-energy
nuclear phenomena. In its framework the nucleus is described as a system of
nucleons which interact by the exchange of different mesons and this
description is based on the Dirac equation.
First, I will discuss the basic features of the CDFT. Then I will
concentrate on recent progress in our understanding of global properties of
covariant energy density functionals. The extremes of nuclear landscape such
as two-neutron drip line and the region of superheavy nuclei will be the
main focus of the discussion. Theoretical uncertainties in their description
and their underlying sources will be discussed next. Their assessment is
important since even with new generation of experimental facilities such as
RIKEN, FRIB and SUPERHEAVY FACTORY, almost half of the Z <= 120 nuclei will
be beyond experimental reach. It turns out that the inaccuracies in the
description of the energies of the single-particle states is the main source
of theoretical uncertainties. Two possible solutions to this problem, such
as particle-vibration coupling and effective tensor interaction, will be
discussed in detail.