Three-body structure of 18Ne in a microscopic model

Abderrahim Adahchour (1, 2) , Pierre Descouvemont (1)

1 ULB - Département d'Informatique [Bruxelles]
2 Faculté des Sciences Semlalia [Marrakech]

The structure of 18 Ne, and in particular of the 1 − (6.18 MeV) level, is investigated in a microscopic cluster model involving 16 O+p+p configurations. We use the three-cluster Generator Coordinate Method associated with the hyperspherical formalism. The spectroscopy of 18 Ne and 18 O low-lying states is analyzed. Using the Analytical Continuation in the Coupling Constant (ACCC) method, we determine the width of the 1 − (6.15 MeV) resonance in 18 Ne and find Γ = 40 ± 10 keV. This result is in fair agreement with experiment (50 ± 5 keV).

Mots clés: 21.60.Gx; 23.50.+z; 27.20.+n

Abderrahim Adahchour, Pierre Descouvemont. Three-body structure of 18Ne in a microscopic model. Journal of Physics G: Nuclear and Particle Physics, 2010, 37 (4), pp.45102. ⟨10.1088/0954-3899/37/4/045102⟩. ⟨hal-00600791⟩