Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Instrumentation VI

HK 25.4: Vortrag

Dienstag, 28. März 2017, 15:00–15:15, F 072

Characterisation of the CALIFA petal response to γ-rays up to 9 MeV — Han-Bum Rhee, •Alexander Ignatov, and Thorsten Kröll for the R3B collaboration — Institut für Kernphysik,TU Darmstadt, Germany

CALIFA is a calorimeter and spectrometer that aims to detect γ-rays and light charged particles. It is a part of the R3B experiment at GSI and the future FAIR facility. CALIFA is divided into a cylindrical barrel[1] and a forward end-cap[2]. The CALIFA barrel consist of CsI(Tl) scintillating crystals, which are individually read out with Avalanche Photodiodes(APDs). The functional units for the CALIFA demonstrator are called petals containing 64 crystals each. The petals are built using the same construction procedures, materials and elements as for CALIFA. In this contribution, we investigated the response of one CALIFA petal to high-energy γ-rays from an AmBe source and from the neutron capture process with the Ni target. The results are compared to the R3BRoot simulation, which is based on the FairRoot. This work is supported by German BMBF(05P12RDFN8,05P15DFN1), HIC for FAIR and GSI-TU Darmstadt cooperation contract.

[1] R3B Collaboration,Technical Design Report for the CALIFA Barrel, November 2011

[2] R3B Collaboration,Technical Design Report for the CALIFA Endcap, August 2015