Orateur
Mlle
Marianne DUFOUR
(Université de Strasbourg)
Description
The transition from descriptions of nuclear-wave functions in terms of A nucleons (fermions)
toward those in terms of n < A composite clusters as e.g. particles (bosons) is far from being
obvious. However, it represents a very interesting challenge which can help to point out states
in which clustering is expected to be strongly dominant as in so-called condensate state, a
typical example being the 0+2 in the 12C nucleus, known as the Hoyle state [1].
During this talk, we will mainly focuss on recent investigations of the 12C nucleus performed
with a nonmicroscopic -particle model involving local and nonlocal potentials [2]. Faddeev
equations formulated in configuration space are used to solve the 3-body problem for bound
and resonant states. We demonstrate that the nonlocal potential developed by Z. Papp and
S. Moszkowski appears to be particularly well-adapted to study 3 clustering. We point out
12C states of positive-parity which share common features with the 0+2 Hoyle states and are
interpreted as 3-condensate states. Several negative-parity states revealing a clear bosonic -
particle structure are also obtained. We will conclude this talk with preliminary results obtained
with a similar nonmicroscrocopic approach complemented by microscopic calculations for the
16O nucleus.
1. T. Yamada, Y. Funaki, H. Horiuchi, G. R¨opke, P. Schuck, A. Tohsaki, Lecture Notes in
Physics 848 (2012) - Springer, Clusters in nuclei -Vol.2.
2. R. Lazauskas, M. Dufour, Phys. Rev. C 84, (2011)
Author
Mlle
Marianne DUFOUR
(Université de Strasbourg)
Co-auteur
Dr
Rimantas Lazauskas
(IPHC Strasbourg)
