Speaker
Mr
José Antonio Lay
(Universidad de Sevilla)
Description
It is well known that, an accurate description of reactions involving weakly-bound nuclei, such as halo nuclei, requires the inclusion of the coupling to the continuum (i.e., unbound) states. For two-body projectiles, a successful technique to describe these processes is the Continuum-Discretized Coupled-Channels (CDCC) method. Here the continuum is replaced by a discrete set of functions, each one representative of a region of the continuum relevant for the reaction. The standard CDCC method uses an average of the scattering two-body wavefunctions in each energy interval (named "bin"). Alternatively, the continuum spectrum can be described by the eigenstates of the Hamiltonian in a basis of square-integrable functions, or pseudo-states (PS).
In this contribution we present a PS basis obtained performing a simple analytic local scale transformation to the harmonic oscillator basis (THO). This THO basis is easy to calculate and reproduces a wide variety of observables, requiring a small number of functions compared to other bases. Moreover, narrow resonances are well characterized by one or two PS. Recently, we have extended this basis to describe systems with a valence+core structure (such as halo nuclei), taking into account the possible excitations of the core. This is the case of 11Be and odd A carbon isotopes. We have applied this model to the 11Be+208Pb reaction at 70MeV/u, where we found an improvement with respect to the single-particle model based on an inert core.
Primary authors
Dr
Antonio M. Moro
(Universidad de Sevilla)
Mr
José Antonio Lay
(Universidad de Sevilla)
Dr
Manuela Rodriguez-Gallardo
(Universidad de Sevilla)
Co-authors
Prof.
Joaquín Gómez-Camacho
(Universidad de Sevilla, CNA)
Prof.
José M. Arias
(Universidad de Sevilla)
