Abstract
We present a detailed study of partial-wave contributions of nuclear forces to pairing in nuclei. For pairing, partial waves beyond the standard channel play an interesting role for the pair formation in nuclei. The additional contributions are dominated by the repulsive partial wave. Their effects, and generally spin-triplet nuclear forces between paired nucleons, are influenced by the interplay of spin-orbit partners. We explore the impact of including partial waves beyond the channel on neutron-neutron pairing gaps in semimagic isotopic chains. In addition, we show that nuclear forces favor over pairing, except in low- orbitals. This is in contrast to the free-space motivation that suggests the formation of deuteron-like pairs in nuclei. The suppression of pairing is because the strength is distributed on spin-orbit partners and because of the effects of the repulsive channel and of waves.
9 More- Received 19 December 2009
DOI:https://doi.org/10.1103/PhysRevC.81.064308
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