Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Postersession
HK 45.22: Poster
Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24
Extraction of the 01+→ 02+ monopole matrix element in 150Nd with high-resolution electron scattering at the S-DALINAC* — •Andreas Krugmann, Simela Aslanidou, Sergej Bassauer, Andreas Ebert, Michaela Hilcker, Tobias Klaus, Christoph Kremer, Peter von Neumann-Cosel, Norbert Pietralla, Vladimir Yu. Ponomarev, Maxim Singer, and Gerhart Steinhilber — IKP, TU Darmstadt
A high resolution electron scattering experiment on the deformed nucleus 150Nd has been performed at the 169∘ spectrometer at the S-DALINAC. The aim of this investigation was the determination of the ρ2(E0;01+ → 02+) transition strength, which is a key signature of an IBM phase-shape transition. Spectra have been taken at various scattering angles with beam energies of 46 MeV and 73 MeV and a very good energy resolution of 4· 10−4 has been achieved, which was crucial for this experiment. The experimental form factor of this particular transition has been compared to a theoretical form factor, constructed by an effective density operator on a microscopic level with the help of the generator coordinate method. The required collective wave functions have been calculated in the Confined β soft rotor model. With this model-dependent analysis the E0 transition strength could be determined for the first time.
* Supported by the DFG under contract SFB 634.