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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. Napiralla^1,2, D. Brugnara⁴, H. Egger³, A. Goasduff⁴, P. R. John¹, N. Pietralla¹, and J. J. Valiente-Dobón⁴ — ¹Institut 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.