Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 28: Struktur und Dynamik von Kernen

HK 28.2: Talk

Wednesday, March 21, 2012, 14:30–14:45, P 4

Non-yrast bands in a coherent quadrupole-octupole model — •Michael Strecker¹, Nikolay Minkov² und Horst Lenske¹ — ¹Institut für Theoretische Physik, Universität Giessen — ²Institute of Nuclear Research and Nuclear Energy, Sofia, Bulgaria

A model assuming coherent quadrupole-octupole vibrations and rotations is applied to describe non-yrast energy sequences with alternating parity in several even-even nuclei from different regions. The energies are calculated from an analytically known formula in which for the first time we consider states with arbitrary large quantum numbers, allowing, as a new feature, to describe higher lying bands. A fit of the model parameters is performed for each nucleus in order to reach the best agreement with the experiment. The mass dependence of the parameters will be discussed. The model reproduces the structure of the spectra together with the observed B(E1), B(E2) and B(E3) reduced transition probabilities in the considered nuclei ^152,154Sm, ^154,156,158Gd, ²³⁶U and ¹⁰⁰Mo.

Aided by HIC for FAIR.