Speaker
Dr
Pierre Capel
(Université Libre de Bruxelles)
Description
The study of exotic nuclear structures, like halo nuclei, is usually performed through indirect techniques, such as reactions. Unfortunately, the complexity of the reaction mechanism and the uncertainty in the choice of projectile-target interactions can cause ambiguities in the analysis of measurements.
We present here a new way to extract information about the structure of halo nuclei through reactions [1]. The basic idea of this new technique is to study the ratio of angular distributions for breakup and scattering. These two processes exhibit very similar features that depend mostly on the projectile-target interaction [2]. The recoil excitation and breakup model [3] predicts that their ratio gives access to halo-structure information by removing the major dependence on the reaction mechanism and the projectile-target interaction. We check this within the dynamical eikonal approximation [4] and show that the ratio clearly reveals projectile-structure information such as the binding energy and orbital of the halo neutron. Experimentally, the ratio has the advantage not to depend on the absolute normalisation of the cross sections.
References
[1] P. Capel, R. C. Johnson, and F. M. Nunes, Phys. Lett. B 705, 112 (2011)
[2] P. Capel, M. Hussein, and D. Baye, Phys. Lett. B 693, 448 (2010)
[3] R. Johnson, J. Al-Khalili, and J. Tostevin, Phys. Rev. Lett. 79, 2771 (1997)
[4] D. Baye, P. Capel, and G. Goldstein, Phys. Rev. Lett. 95, 082502 (2005)
Primary author
Dr
Pierre Capel
(Université Libre de Bruxelles)
Co-authors
Prof.
Filomena Nunes
(Michigan State University)
Prof.
Ronald Johnson
(University of Surrey)
