[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Friday, Aug. 21, 2009
1:00 p.m.
CEBAF Center, Room L104

"Three Body Model for Halo Nuclei and the Efimov Effect"

Indranil Mazumdar
Tata Institute of Fundamental Research, Mumbai, India

The discovery of light neutron rich nuclei near the drip line showing 
either a pronounced halo of one or two neutrons or a neutron skin of 
several neutrons have opened up new vistas in contemporary nuclear 
physics. The first part of this talk will be devoted to an introduction 
to the discovery of halo nuclei and the global efforts in this 
direction. We will then introduce the result of our calculations using a 
three-body model to understand the key structural properties of these 
nuclei.  The two-neutron halo nuclei are the ideal candidates for 
studying the Efimov effect in atomic nuclei.  In the second part of the 
talk we will present our work to investigate the occurrence of Efimov 
states in two-neutron halo nuclei, like, 14Be, 19B, 20C, 22C. We will 
also present the result of our calculations to study the evolution of 
the bound Efimov states into resonances with increasing two-body 
(neutron-core) binding energy. Finally, we will tie up the emergence of 
the asymmmetric resonances with the Fano phenomenon and discuss its 
implication for the possible experimental observation of Efimov states 
in the atomic nuclei.