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Abstract: A direct fit of the isoscalar spin-orbit SO and both isoscalar andisovector tensor coupling constants to the f5-2-f7-2 SO splittings in 40Ca,56Ni, and 48Ca nuclei requires a drastic reduction of the isoscalar SO strengthand strong attractive tensor coupling constants. The aim of this work is toaddress further consequences of these strong attractive tensor and weak SOfields on binding energies, nuclear deformability, and high-spin states. Inparticular, we show that contribution to the nuclear binding energy due to thetensor field shows generic magic structure with tensorial magic numbers atNZ=14, 32, 56, or 90 corresponding to the maximum spin-asymmetries in 1d5-2,1f7-2-2p3-2, 1g9-2-2d5-2 and 1h11-2-2f7-2 single-particle configurations andthat these numbers are smeared out by pairing correlations and deformationeffects. We also examine the consequences of strong attractive tensor fieldsand weak SO interaction on nuclear stability at the drip lines, in particularclose to the tensorial doubly magic nuclei and discuss the possibility of anentirely new tensor-force driven deformation effect.



Author: M. Zalewski, P. Olbratowski, M. Rafalski, W. Satula, T.R. Werner, R.A. Wyss

Source: https://arxiv.org/







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