The IBM description of triaxial nuclei

0348493 - ÚJF 2011 RIV DE eng J - Článek v odborném periodiku
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
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: INTERACTING-BOSON MODEL * COLLECTIVE MODEL * PHASE-TRANSITIONS
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 2.592, rok: 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to the availability of the SO(5) Clebsch-Gordan (CG) coefficients, computed in floating-point arithmetic (T.A. Welsh, unpublished ( 2008)).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.
Trvalý link: http://hdl.handle.net/11104/0189018