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The IBM description of triaxial nuclei

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    0348493 - ÚJF 2011 RIV DE eng J - Journal Article
    Thiamová, Gabriela
    The IBM description of triaxial nuclei.
    European Physical Journal A. Roč. 45, č. 1 (2010), s. 81-90. ISSN 1434-6001. E-ISSN 1434-601X
    Institutional research plan: CEZ:AV0Z10480505
    Keywords : INTERACTING-BOSON MODEL * COLLECTIVE MODEL * PHASE-TRANSITIONS
    Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
    Impact factor: 2.592, year: 2010

    Recently, interacting boson model (IBM) calculations, in the O(6) basis up to the seniority quantum number v(max) = 40, were made possible thanks to the availability of the SO(5) Clebsch-Gordan (CG) coefficients, computed in floating-point arithmetic (T.A. Welsh, unpublished ( 2008)). In this paper we have made use of these CG coefficients to extend the IBM to situations where triaxial deformation is present. Such a description has been considered in the algebraic collective model (ACM) which is an algebraic version of the Bohr model. To describe triaxiality in the ACM a term proportional to cos(2) 3 gamma. must be included in the Hamiltonian. We show that, in the IBM, this can be achieved by including a term quadratic in ((Q) over cap circle times (Q) over cap circle times ($) over cap)(0), which is an IBM image of the term cos(2) 3 gamma.
    Permanent Link: http://hdl.handle.net/11104/0189018

     
     
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