ar X iv : n uc l - th / 9 81 10 45 v 2 6 M ay 1 99 9 Alternative evaluations of halos in nuclei

ar X iv : n uc l - th / 9 81 10 45 v 1 1 2 N ov 1 99 8 Alternative evaluations of halos in nuclei

Data for the scattering of 6 He, 8 He, 9 Li, and 11 Li from hydrogen are analyzed within a fully microscopic folding model of proton-nucleus scattering. Current data suggest that of these only 11 Li has a noticeable halo. The available data for the 6 Li(γ, π +) 6 He gs reaction support the conclusion that 6 He does not.

ar X iv : n uc l - th / 9 81 10 45 v 3 1 D ec 1 99 9 Alternative evaluations of halos in nuclei

Data for the scattering of 6 He, 8 He, 9 Li, and 11 Li from hydrogen are analyzed within a fully microscopic folding model of proton-nucleus scattering. Current data suggest that of these only 11 Li has a noticeable halo. For 6 He, we have also analyzed the complementary reaction 6 Li(γ, π +) 6 He gs. The available data for that reaction support the hypothesis that 6 He may not be a halo nucleu...

ar X iv : n uc l - th / 9 90 50 49 v 2 2 6 M ay 1 99 9 η - and η ′ - meson production in the reaction pn → dM near threshold

ar X iv : n uc l - th / 9 90 50 49 v 1 2 1 M ay 1 99 9 η - and η ′ - meson production in the reaction pn → dM near threshold

X iv : n uc l - th / 9 80 50 15 v 1 6 M ay 1 99 8 Pairing and symmetry energy in N ≃ Z nuclei

It is shown that in N ≃ Z nuclei the effects of isovector pairing and the symmetry energy are intimately related. In particular, in the odd-odd N = Z nuclei these two effect are essentially equal in magnitude, causing near degeneracy of the lowest T = 1 and T = 0 states and appearance of the T = 1 ground state isospin in many such nuclei. To illustrate the validity of the considerations present...