Eur. Phys. J. A 12, 155-159 (2001)
Hartree-Fock-Bogoliubov calculations of the rotational band of the very heavy 254No nucleusH. Laftchiev1, 2, D. Samsoen1, P. Quentin1 and J. Piperova2
1 Centre d'Études Nucléaires de Bordeaux Gradignan, CNRS-IN2P3 and Université Bordeaux-I, BP 120, F-33175 Gradignan, France
2 Institute of Nuclear Research and Nuclear Energy (Bulgarian Academy of Sciences), Tzarigradsko Chaussee 72, 1784 Sofia, Bulgaria
(Received: 23 November 2000 / Revised version: 27 June 2001 Communicated by P. Schuck)
We report on Hartree-Fock-Bogoliubov (HFB) calculations of the ground-state rotational band of the heavy nucleus 254No recently observed experimentally. The calculated quadrupole deformation is consistent with the experimental value of and is almost constant over the whole band. We also reproduce fairly well the excitation spectra and moments of inertia of this isotope up to the maximal experimentally observed state of spin 20. The rather high stability of this nucleus against fission is illustrated by the deformation energy curve providing very high fission barriers at zero spin within the HFB and HFB plus Lipkin-Nogami formalisms. The variation of these barriers with increased angular velocities is also studied.
21.10.Re - Collective levels.
21.60.Ev - Collective models.
21.60.Jz - Hartree-Fock and random-phase approximations.
© Società Italiana di Fisica, Springer-Verlag 2001