Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 10: Struktur und Dynamik von Kernen III

HK 10.4: Vortrag

Montag, 21. März 2011, 17:30–17:45, A-1

Charge Exchange Excitation in Nuclei — •Abdul A. Ataie and Horst Lenske — Institut für Theoretische Physik, Universität Giessen

We study charge-exchange transitions in stable and exotic nuclei. These reactions are of interest to study electron capture process during the collapse of massive stars. The charge exchange excitations are calculated by QRPA from a self-consisting HFB ground state. We use an extended QRPA ansatz which, besides pairing effects, also accounts for the coupling to the continuum and dissipative contributions. The spectral distributions and transition probabilities are extracted from the polarization propagator. The polarization propagator is calculated by solving directly the Dyson-equation. For studying the Ikeda sum rule the analysis of the continuum region is of importance. Results of different nuclei in the carbon and in the Fe-Ni region for natural and unnatural parity excitations are discussed.

Supported by DFG, HIC for FAIR and GSI.