Year: 1995
Type: article
Abstract: The Lee-Suzuki iteration method is used to include the folded diagrams in the calculation of the two-body effective interaction ${\mathit{v}}_{\mathrm{eff}}^{(2)}$ between two nucleons in a no-core model space. This effective interaction still depends upon the choice of single-particle basis utilized in the shell-model calculation. Using a harmonic-oscillator single-particle basis and the Reid-soft-core NN potential, we find that ${\mathit{v}}_{\mathrm{eff}}^{(2)}$ overbinds $^{4}\mathrm{He}$ in 0, 2, and 4\ensuremath{\Elzxh}\ensuremath{\Omega} model spaces. As the size of the model space increases, the amount of overbinding decreases significantly. This problem of overbinding in small model spaces is due to neglecting effective three- and four-body forces. Contributions of effective many-body forces are suppressed by using the Brueckner-Hartree-Fock single-particle Hamiltonian.
Source: Physical Review C
Authors: D. C. Zheng, B. R. Barrett, J. P. Vary, H. Müther
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: U.S. Department of Energy
OpenAlex ID: W2012183476