Eur. Phys. J. A (2005) 25: 323-324
https://doi.org/10.1140/epjad/i2005-06-152-7

ENAM 2004

Borromean nuclei and three-body resonances

¹ Instituto de Estructura de la Materia, CSIC, E-28006, Madrid, Spain
² Department of Physics and Astronomy, University of Aarhus, DK-8000, Aarhus C, Denmark

^* e-mail: fedorov@phys.au.dk

Received: 4 November 2004
Accepted: 31 March 2005
Published online: 11 August 2005

Abstract

The interconnection between the resonances and virtual states of a three-body system and the resonances and virtual states in its two-body subsystems is investigated using the Borromean halo nucleus ¹¹Li as a realistic example. The three-body core + neutron + neutron model is used, where the neutron-core interaction is fixed to reproduce a given s-wave virtual state and a p-wave resonance. The neutron-neutron interaction is then multiplied by a factor which is progressively changed from 0 to 1 and the resulting trajectories of the three-body states in the complex energy plane are investigated.