Seminarium Fizyki Jądra Atomowego

Halo nuclei are extreme nuclear states consisting of one or more weakly-bound valence nucleons spatially decoupled from a tightly bound core [1]. The reduced binding favors barrier tunneling and extended density distribution, the so called "nuclear halo”. Some examples of neutron haloes are 6He, 11Li, 11Be or 15C [2]. For proton rich systems the Coulomb repulsion prevents halo formation and only the cases of 8B and 17Ne have been confirmed [3-5]. In this talk experimental results on low energy reactions with halo nuclei will be reviewed. The weakly bound nature of the halo dominates the reaction probability, but the specific reaction mechanisms depend on the halo, core and target structure [6]. Despite of the inherent complexity of the reaction process, simple two-body cluster models and direct reaction theories can be used to extract useful information of the structure of the halo nucleus and its dynamics [7-9].

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[2] T. Minamisono et al., Phys. Rev. Lett. 69, 2058 (1992).
[3] W. Schwab et al., Z. Phys. A 350, 283 (1995).
[4] J. Kelley et al., Phys. Rev. Lett. 77, 5020 (1996).
[5] M. Fukuda et al., Nuci. Phys. A 656, 209 (1999).
[6] I. Tanihata, H. Savajols, R. Kanungo, Prog. Part. Nuci. Phys. 68 (2013) 215.
[7] M.S. Hussein, L.F. Canto, R. Donangelo. Nucl. Phys. A 722 (2003) C321.
[8] P. Capel, R.C. Johnson, F.M. Nunes. Eur. Phys. J. A 56 (2020) 300.
[9] I. Martel, N. Keeley, K. W. Kemper and K. Rusek. Phys. Rev. C 102 (2020) 34609.

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