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  • 151. Zalewski, M.
    et al.
    Satula, Wojtek
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Dobaczewski, J.
    Olbratowski, P.
    Rafalski, M.
    Werner, T. R.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Shell structure fingerprints of tensor interaction2009Inngår i: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 42, nr 3, s. 577-581Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We address the consequences of strong tensor terms in the local energy density functional, resulting from fits to the f(5/2)-f(7/2) splittings in Ca-40, Ca-48, and Ni-56. In this study, we focus on the tensor contribution to the nuclear binding energy. In particular, we show that it exhibits an interesting topological feature closely resembling that of the shell correction. We demonstrate that in the extreme single-particle scenario at spherical shape, the tensor contribution shows tensorial magic numbers equal to N(Z) = 14, 32, 56, and 90, and that this structure is smeared out due to configuration mixing caused by pairing correlations and migration of proton/neutron sub-shells with neutron/proton shell filling. Based on a specific Skyrme-type functional SLy4(T), we show that the proton tensorial magic numbers shift with increasing neutron excess to Z = 14, 28, and 50.

  • 152. Zdunczuk, H.
    et al.
    Satula, Wojtek
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Probing spin fields and spin-orbit term of the local nuclear energy functional at band termination2005Inngår i: International Journal of Modern Physics E, ISSN 0218-3013, Vol. 14, nr 3, s. 451-456Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A systematic study of the terminating states in A similar to 50 mass region using the self-consistent Skyrme-Hartree-Fock model is presented. The objective is to use the intrinsic simplicity of the terminating states to constrain certain parameters of the local nuclear energy functional. In particular, the work focuses on the spin fields and the spin-orbit term and constrain the appropriate Landau parameters and the strength of the spin-orbit potential.

  • 153. Zdunczuk, H.
    et al.
    Satula, Wojtek
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Probing the nuclear energy functional at band termination2005Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 71, nr 2, s. 024305-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A systematic study of terminating states in the Asimilar to50 mass region using the self-consistent Skyrme-Hartree-Fock model is presented. The objective of this study is to demonstrate that the terminating states, due to their intrinsic simplicity, offer unique and so far unexplored opportunities to study different aspects of the effective NN interaction or nuclear local energy density functional. In particular, we show that the agreement of the calculations to the data depends on the spin fields and the spin-orbit term which, in turn, allows us to constrain the appropriate Landau parameters and the strength of the spin-orbit potential. The present study reveals that the structure and energy of terminating states can be used as a tool to differentiate among the many Skyrme force parametrizations.

  • 154. Zheng, S. J.
    et al.
    Xu, F. R.
    Shen, S. F.
    Liu, H. L.
    Wyss, Ramon
    KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnfysik.
    Yan, Y. P.
    Shape coexistence and triaxiality in nuclei near Zr-802014Inngår i: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 90, nr 6, s. 064309-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Total-Routhian-surface calculations have been performed to investigate the shape evolutions of A similar to 80 nuclei: Zr80-84, Sr76-80, and Mo-84,Mo-86. Shape coexistences of spherical, prolate, and oblate deformations have been found in these nuclei. Particularly for the nuclei Sr-80 and Zr-82, the energy differences between two shape-coexisting states are less than 220 keV. At high spins, the g(9/2) shell plays an important role in shape evolutions. It has been found that the alignment of the g(9/2) quasiparticles drives nuclei to be triaxial.

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