Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Structure and Dynamics of Nuclei 7

HK 35.4: Vortrag

Dienstag, 24. März 2015, 18:00–18:15, T/SR14

Lifetime measurement in the region of neutron rich Zirconium isotopes — •Damian Ralet^1,2, Stephane Pietri², Juergen Gerl², and Norbert Pietralla¹ for the S428 PreSPEC and AGATA collaboration — ¹Technische Universität, Darmstadt, Germany — ²Helmholtzzentrum für Schwerionenforschung GmbH (GSI), Darmstadt, Germany

A gamma-ray spectroscopy experiment for the measurement of excited states lifetimes of ¹⁰⁶Zr was performed at GSI using the PreSPEC-AGATA setup. A ²³⁸U primary beam from the SIS18 was fissioned on a Beryllium target positioned at the entrance of the FRagement Separator (FRS) to produce ¹⁰⁷Nb ions identified, and selected by the FRS. The particles of this secondary beam were fragmented at relativistic energy (β=v/c∼0.5) on a 700 mg/cm² thick Beryllium target positioned at the center of the Advanced GAmma Tracking Array (AGATA). The ¹⁰⁶Zr reaction products were identified by the Lund York Cologne Calorimeter (LYCCA). The energy and position of the gamma-rays emitted by these ejectiles were measured by 19-AGATA detectors. The position sensitivity of AGATA coupled with LYCCA detectors allow a lifetime determination using the Doppler Shift Attenuation Method (DSAM). The status of the data analysis and preliminary lifetime estimations will be presented.