Contributions From High Momentum Intermediate States to Effective Nucleon Nucleon Interactions
1981
12 pages
Published in:
- Phys.Rev.C 23 (1981) 1765-1776
Citations per year
Abstract: (APS)
We reexamine the intermediate state convergence problem for the core polarization diagram (G3p1h) in the expansion of an effective shell-model interaction using a modern meson exchange Bonn-Jülich potential in comparison to the phenomenological Reid soft-core interaction. The Bonn-Jülich N−N potential contains a much weaker tensor force as compared with the Reid soft-core interaction. As a consequence its repulsive contributions to G3p1h from high momentum intermediate particle states are much reduced and G3p1h can be calculated in a good approximation with 2ℏω particle-hole excitations alone. This opens up the possibility of calculating higher order processes in a reliable and expendient way. We have further determined the spectra of O18 and F18 using the folded diagram perturbation theory to determine the effective interaction. The energy levels are best reproduced by the Bonn-Jülich N−N potential.
NUCLEAR STRUCTURE O18, F18; dependence of effective interaction on N−N tensor force. Convergence of intermediate state summation in core polarization.- NUCLEAR MODEL
- MESON: EXCHANGE
- EXCHANGE: MESON
- MOMENTUM: HIGH
- NUCLEON NUCLEON: INTERACTION
- INTERACTION: NUCLEON NUCLEON
- MODEL: POTENTIAL
- FORCE: TENSOR
- OXYGEN: ENERGY LEVELS
- FLUORINE: ENERGY LEVELS
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