München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.41: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium

Spatial Resolution-Induced Restraints for γγ/γ Experiments with AGATA — •P. Napiralla1,2, D. Brugnara4, H. Egger3, A. Goasduff4, P. R. John1, N. Pietralla1, and J. J. Valiente-Dobón41Institut für Kernphysik, TU Darmstadt, Darmstadt, Germany — 2GSI, Darmstadt, Germany — 3AG Numerik und Wissenschaftliches Rechnen, TU Darmstadt, Darmstadt, Germany — 4INFN LNL, Legnaro, Italy

The competitive double γ-decay (γγ/γ) is a strongly suppressed second order decay process in nuclear physics. Its first observation in the nucleus 137Ba [1] was performed using five LaBr3:Ce scintillation detectors in a star-shaped configuration which severely limits the measurement of angular correlations between emitted γ rays. Using the Advanced GAmma Tracking Array AGATA, a detailed resolution of angular correlations could be possible. However, due the limited time resolution of AGATA’s high-purity germanium detectors, the experimental analysis has to fully rely on γ-ray tracking methods.
Based on a Geant4 simulation, a technical feasibility study of γγ/γ experiments with AGATA using 137Ba as an example case is presented. The impact of AGATA’s metrological restraints is emphasized.
This work was supported by the German BMBF under grant Nos. 05P15RDFN1 and 05P15(18)RDFN9, HGS-HIRe and HIC for FAIR.
[1] C.Walz et al., Nature 526 (2015) 406-409.

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