Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Structure and Dynamics of Nuclei IX

HK 60.4: Vortrag

Freitag, 31. März 2017, 15:00–15:15, F 2

Investigation of the low-lying dipole strength in 142Ce — •Miriam Müscher1, Johann Isaak2, Simon G. Pickstone1, Deniz Savran3, Mark Spieker1, Julius Wilhelmy1, and Andreas Zilges11Institute for Nuclear Physics, University of Cologne — 2RCNP, Osaka, Japan — 3Research Division, GSI, Darmstadt, Germany

The low-lying dipole-strength of 142Ce is investigated with the nuclear resonance fluorescence (NRF) method at the Darmstadt High Intensity Photon Setup (DHIPS) using bremsstrahlung with an endpoint energy of 7.35   MeV. Nuclei are excited by γ-rays from the ground state to predominantly J=1 states and with a lower probability to J=2 states. Afterwards, they decay via photonemission to another low-lying excited state or directly to the ground state. Due to the angular correlation of the incident photon beam and the emitted γ quanta, one is able to assign a certain multipolarity to each transition and the transition strength can be determined.

The dipole response of 142Ce will be presented and discussed regarding its evolution near the closed N=82 shell.

Supported by the DFG (ZI 510/7-1) and by the Alliance Program of the Helmholtz Association (HA216/EMMI).

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