Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-10-08
Phys.Lett. B468 (1999) 1-6
Physics
Nuclear Physics
Nuclear Theory
5 pages REVTeX, 5 eps figures, accepted for publication in Phys. Lett. B
Scientific paper
The phenomenological adjustment of the nuclear pairing strength is usually performed with respect to the odd-even staggering of the binding energies. We find that the results strongly depend on the way in which the ground states of the odd nuclei are computed. A thorough calculation including all time-even and time-odd polarisation effects induced by the odd nucleon produces about 30% reduced odd-even staggering as compared to the standard spherical calculations in the relativistic mean-field model. The pairing strength must be enhanced by about 20% to compensate for that effect. The enhanced strength has dramatic consequences for the predicted deformation properties of the underlying mean-field models, possibly implying that new adjustments of their parameters become necessary as well.
Bender Martin
Maruhn Joachim A.
Reinhard Paul-Gerhard
Rutz K.
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