Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines nucl-th
Date Mercredi 16 Octobre 2019
Heure 10:30
Institut IPN
Salle Bâtiment 100, Salle A015
Nom de l'orateur Balbutsev
Prenom de l'orateur E.b.
Addresse email de l'orateur
Institution de l'orateur Bogoliubov Laboratory of Theoretical Physics JINR, Dubna, Russia
Titre Triplet Structure of Nuclear Scissors Mode.
Résumé Low energy $M1$ excitations are studied within the Time Dependent Hartree-Fock-Bogoliubov (TDHFB) approach. The solution of TDHFB equations by the Wigner Function Moments method predicts three types of scissors modes. Together with the conventional scissors mode generated by the counter-rotation of protons against neutrons, two new modes arise due to spin degrees of freedom ("spin" scissors). The mean excitation energies and summed $M1$ strengths of two higher states are in rather good agreement with the experimental systematic. The lowest one generates a remarkable $M1$ strength below the conventional energy range. It was observed experimentally only in Dy isotopes. For all the rest Rare Earth nuclei and Actinides the lowest nuclear scissors, found by calculations, is the prediction.
Numéro de preprint arXiv
Commentaires $ $
Fichiers attachés
  • 2019_10_23_E_Balbutsev.pdf (207148 bytes) OPEN

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