München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 24: Kernphysik/Spektroskopie
HK 24.4: Vortrag
Dienstag, 21. März 2006, 18:00–18:15, C
Test of Pseudospin Symmetry through l-Forbidden Gamow-Teller Transitions.* — •B. Özel1, A. Byelikov1, P. von Neumann-Cosel1, and J. N. Ginocchio2 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2Therotical Division, Los Alamos National Laboratory
The idea of pseudospin was introduced to explain the quasidegeneracy in spherical nuclei between single-nucleon states with quantum numbers (n,l,j=l+1/2) and (n−1,l+2,j=l+3/2). Transitions between pseudospin partners are of so-called l-forbidden GT or M1 type. Pseudospin symmetry has been shown to be a relativistic SU(2) symmetry of the Dirac Hamiltonian [1]. Application of relativistic SU(2) symmetry leads to specific predictions for the strengths of M1 and GT transitions between them depending only on the magnetic moments. It has been tested for M1 transitions against experimental data with overall good agreement [2]. This motivates an analogous test for GT transitions, pursued in this work.
[1] J. N. Ginocchio, Phys. Rev. Lett. 78, 436 (1997)
[2] P. von Neumann-Cosel and J.N. Ginocchio, Phys. Rev. C62 (2000)*Supported by the DFG under SFB 634.