Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Structure and Dynamics of Nuclei 8
HK 36.4: Vortrag
Dienstag, 24. März 2015, 18:15–18:30, T/HS2
Study of ground and excited state decays in N ≈ Z Ag nuclei — •Kevin Moschner1, Andrey Blazhev1, Plamen Boutachkov2, Paul Davies3, Robert Wadsworth3, and Nigel Warr1 for the EURICA-RIBF83 collaboration — 1IKP, University of Cologne, Germany — 2GSI Darmstadt, Germany — 3University of York, UK
A decay spectroscopy experiment was performed within the EURICA campaign at RIKEN in 2012. It aimed at the isomer and particle spectroscopy of excited states and ground states in the mass region below the doubly magic 100Sn.
Projectile fragmentation of a 345 MeV/u 124Xe beam on a 9Be target was used to create the nuclei of interest. The fragments were then separated and identified on an event-by-event basis in the BigRIPS spectrometer and transported to the EURICA array to perform decay spectroscopy after implantation in the active stopper SIMBA.
In 94Ag a more precise value for the half-life of the ground state’s superallowed Fermi transition was deduced. In addition the energy spectra of the mentioned decay could be reproduced through precise Geant4 simulations of the used active stopper SIMBA which enabled us to extract Qβ values from the measured data.
Additionally, newly determined half-life values of the (37/2+) and (23/2+) isomers in 95Ag will be presented.
This work is supported by the German BMBF under contract Nos. 05P09PKCI5 and 05P12PKFNE.