Göttingen 1997 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 62: Kernspektroskopie, mittelschwere Kerne IV, schwere Kerne VI

HK 62.8: Vortrag

Donnerstag, 27. März 1997, 18:45–19:00, HS E

Scissors Mode Studies in Even-Even Nuclei in the Framework of the Pseudo-SU(3) Model — •D. Rompf¹, T. Beuschel², J. Hirsch³, J.P. Draayer², and W. Scheid¹ — ¹Institut für Theoretische Physik Justus-Liebig-Universität, Gießen, Heinrich-Buff-Ring 16, D-35392 Gießen — ²Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA — ³Departamento de Fisica, Centro de Investigacion y de Estudios Avanzados del I.P.N., A.P. 14-740 Mexico 07000 D.F., Mexico

We use an extended version of the pseudo-SU(3) model in which proton-neutron and spin degrees of freedom are explicitly incorporated to study low-lying magnetic dipole exitations (”Scissors Modes”) in even-even rare-earth nuclei. Based on an interpretation of the Two Rotor Model in terms of the SU(3) scheme the problem of the fragmentation of the M1 transition strength is addressed and calculations for several nuclei are presented. Furthermore, the dependence of the total Scissors Mode strength on the E2 transition strength from 0₁⁺ to 2₁⁺ is investigated.