Quantum Monte Carlo calculations of excited states in A = 6--8 nuclei

Details Quantum Monte Carlo calculations of excited states in A = 6--8 nuclei Quantum Monte Carlo calculations of excited states in A = 6--8 nuclei

2004-09-07

arxiv.org/abs/nucl-th/0409012v2

Phys.Rev.C70:054325,2004

Physics

Nuclear Physics

Nuclear Theory

Revised version with minor changes as accepted by Phys. Rev. C. 11 pages

Scientific paper

10.1103/PhysRevC.70.054325

A variational Monte Carlo method is used to generate sets of orthogonal trial functions, Psi_T(J^pi,T), for given quantum numbers in various light p-shell nuclei. These Psi_T are then used as input to Green's function Monte Carlo calculations of first, second, and higher excited (J^pi,T) states. Realistic two- and three-nucleon interactions are used. We find that if the physical excited state is reasonably narrow, the GFMC energy converges to a stable result. With the combined Argonne v_18 two-nucleon and Illinois-2 three-nucleon interactions, the results for many second and higher states in A = 6--8 nuclei are close to the experimental values.

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