ar X iv : n uc l - th / 9 80 50 18 v 1 7 M ay 1 99 8 Three Body Bound State Calculations without Angular Momentum Decomposition

ar X iv : n uc l - th / 9 80 20 12 v 1 3 F eb 1 99 8 COMPUTATION OF TWO - BODY MATRIX ELEMENTS FROM THE ARGONNE v 18 POTENTIAL

We discuss the computation of two-body matrix elements from the Argonne v 18 interaction. The matrix elements calculation is presented both in particle-particle and in particle-hole angular momentum coupling. The procedures developed here can be applied to the case of other NN potentials, provided that they have a similar operator format.

ar X iv : n uc l - th / 9 80 50 53 v 1 2 9 M ay 1 99 8 g - factor of a tightly bound electron

We study the hyperfine splitting of an electron in hydrogen-like 209 Bi 82+. It is found that the hfs energy splitting can be explained well by considering the g-factor reduction due to the binding effect of a bound electron. We determine for the first time the experimental value of the magnetic moment of a tightly bound electron.

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

ar X iv : n uc l - th / 9 80 50 45 v 1 2 3 M ay 1 99 8 1 Structure Effects on Coulomb Dissociation of 8 B

Coulomb Dissociation provides an alternative method for determining the radiative capture cross sections at astrophysically relevant low relative energies. For the breakup of 8 B on 58 Ni, we calculate the total Coulomb Dissociation cross section and the angular distribution for E1, E2 and M1. Our calculations are performed first within the standard first order semiclassical theory of Coulomb E...

X iv : n uc l - th / 9 80 50 07 v 1 4 M ay 1 99 8 Neutrino capture by r - process waiting - point nuclei

We use the Quasiparticle Random Phase Approximation to include the effects of low-lying Gamow-Teller and first forbidden strength in neutrino capture by very neutron-rich nuclei with N = 50, 82, or 126. For electron neutrinos in what is currently considered the most likely r-process site the capture cross sections are two or more times previous estimates. We briefly discuss the reliability of o...