Universal properties and structure of halo nuclei

Details Universal properties and structure of halo nuclei Universal properties and structure of halo nuclei

2008-07-21

arxiv.org/abs/0807.3258v1

Eur.Phys.J.A37:367-380,2008

Physics

Nuclear Physics

Nuclear Theory

23 pages, 9 eps figures, revtex4

Scientific paper

10.1140/epja/i2008-10632-4

The universal properties and structure of halo nuclei composed of two neutrons (2n) and a core are investigated within an effective quantum mechanics framework. We construct an effective interaction potential that exploits the separation of scales in halo nuclei and treat the nucleus as an effective three-body system. The uncertainty from higher orders in the expansion is quantified through theoretical error bands. First, we investigate the possibility to observe excited Efimov states in 2n halo nuclei. Based on the experimental data, 20C is the only halo nucleus candidate to possibly have an Efimov excited state, with an energy less than 7 keV below the scattering threshold. Second, we study the structure of 20C and other 2n halo nuclei. In particular, we calculate their matter form factors, radii, and two-neutron opening angles.

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