Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 59: Nuclear Structure and Dynamics II
HK 59.3: Vortrag
Mittwoch, 18. März 2009, 17:15–17:30, H-ZO 50
Microscopic cluster model of 5H and 5He (T=3/2) — •Pierre Descouvemont and Abderrahim Adahchour — Physique Nucléaire Théorique, Université Libre de Bruxelles (ULB), B1050 Brussels, Belgium
We use the Generator Coordinate Method to investigate the 5H and 5He systems in the hyperspherical formalism. The microscopic wave functions are described by a 3H+n+n cluster structure for 5H, and by a mixing of 3H+p+n and 3He+n+n configurations for 5He. The resonance properties are analyzed with the Analytic coupling in the Continuum Constant (ACCC) method. For 5H, we find results consistent with the literature, but the ground-state width is lower than in previous works. The calculation suggests J=1/2+ and J=3/2+ states in 5He which correspond to the isobaric analog states of low-lying levels in 5H. A J=1/2+; T=3/2 state is found near Ex=21.3 MeV in 5He, with a width of Γ ≈ 1 MeV.