Monday, December 3, 2012, 10:30 AM, room 385E

The No-Core Shell Model with General Radial Bases

Mark A. Caprio (University of Notre Dame)

Calculations in the ab initio no-core shell model have conventionally been carried out using the harmonic-oscillator many-body basis. However, the rapid falloff (Gaussian asymptotics) of the oscillator functions at large radius makes them poorly suited for the description of the asymptotic properties of the nuclear wavefunction. In this talk, we will establish the foundations for carrying out no-core configuration interaction calculations with an alternative many-body basis built from Coulomb-Sturmian functions. These provide a complete, discrete set of functions with a realistic exponential falloff. We will then examine illustrative calculations for ⁶Li with a Coulomb-Sturmian basis and investigate the center-of-mass separation and spurious excitations.