Auxiliary potential in no-core shell-model calculations
- Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)
The Lee-Suzuki iteration method is used to include the folded diagrams in the calculation of the two-body effective interaction {ital v}{sub eff}{sup (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 {ital NN} potential, we find that {ital v}{sub eff}{sup (2)} overbinds {sup 4}He in 0, 2, and 4{h_bar}{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.
- Research Organization:
- Iowa State Univ., Ames, IA (United States)
- DOE Contract Number:
- FG02-87ER40371
- OSTI ID:
- 44684
- Journal Information:
- Physical Review, C, Vol. 51, Issue 5; Other Information: PBD: May 1995
- Country of Publication:
- United States
- Language:
- English
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