Three- continuum states

Pierre Descouvemont (1)

1 ULB - Département d'Informatique [Bruxelles]

We investigate three-α continuum states in the hyperspherical formalism for J = 0 + and J = 2 +. Two different types of α + α interactions are used: the shallow Ali-Bodmer potential and the deep potential of Buck et al. We determine the 3α phase shifts up to E = 6 MeV, in parallel with an analysis of resonances in the framework of the Complex Scaling method. We show that shallow potentials provide additional narrow resonances, in contrast with experimental data. Deep potentials, however, only give rise to broad resonances, and are more consistent with the data.

Mots clés: 21.60.Gx; 25.70.Ef; 24.10.Cn

Pierre Descouvemont. Three- continuum states. Journal of Physics G: Nuclear and Particle Physics, 2010, 37 (6), pp.64010. ⟨10.1088/0954-3899/37/6/064010⟩. ⟨hal-00600799⟩