Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Struktur und Dynamik von Kernen

HK 11.7: Vortrag

Montag, 17. März 2014, 18:15–18:30, HZ 5

Study of isomer and proton decays in N ≤ Z nuclei below ¹⁰⁰Sn — •Kevin Moschner¹, Andrey Blazhev¹, Plamen Boutachkov², Paul Davis³, and Robert Wadsworth³ for the EURICA collaboration — ¹IKP, University of Cologne, Germany — ²GSI Darmstadt, Germany — ³University of York, UK

The RIBF83 experiment was the first experiment performed within the EURICA project at the new-generation Radioactive Isotope Beam Facility (RIBF) at RIKEN, Japan. The aim of this experiment is to further probe the decays of known isomers in N = Z nuclei, in order to provide detailed tests of the shell model, as well as search for evidence of predicted, but as yet unobserved isomers in N ≤ Z nuclei.

To create the nuclei of interest projectile fragmentation of a 345 MeV/u ¹²⁴Xe beam on a ⁹Be target was used. The fragments were then separated and identified on an event by event basis in the BigRIPS spectrometer.

The EURICA setup utilizes the γ-ray efficiency of 12 EUROBALL HPGe cluster detectors in the RISING Stopped Beam configuration and the active stopper SIMBA composed of a segmented Si-array allowing for β-calorimetry measurements of positrons emitted in decays with Q_β∼ 10 MeV.

Although data analysis is still on-going to search for unknown isomeric transitions and study the particle and particle-γ decays of the implanted nuclei, first results will be presented in this contribution.

This work is supported by the German BMBF under contract Nos. 05P09PKCI5 and 05P12PKFNE.