QUENTIN, P.; BARTEL, J.

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QUENTIN, P.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

BARTEL, J.
Institut Pluridisciplinaire Hubert Curien [IPHC]

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Communication dans un congrès

Ce document a été publié dans

Bulg.J.Phys., Bulg.J.Phys., 2017-10-05, Sofia. 2017, vol. 44, n° 4, p. 326-333

Résumé en anglais

Pairing correlations are generating, as well-known, counter-rotating currents in well-deformed nuclei undergoing a collective rotation, a phenomenon dubbed as the Coriolis anti-pairing effect. It has already been shown that the coupling of these currents with those generated by the global rotation could be well described within the Chandrasekhar S-ellipsoid framework. Taking stock of this, we express the energies of states within a K = 0 band of even-even nuclei in the form of a fixed polynomial of order three in the square of the angular velocity where the only quantities to be entered for each nucleus are the equilibrium intrinsic deformation and the energy of the first 2^+ state. Calculations have been performed for a selection of deformed rare-earth and actinide nuclei. Despite the relatively minor input of data, the agreement with the experimental energies within a band is generally found to be very good up to rather high spins, up to a point where other coupling mechanisms start to be effective, like e.g. the centrifugal stretching or the back-bending phenomenon.< Réduire

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Centre d'Études Nucléaires de Bordeaux Gradignan (CENBG)