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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster

HK 52.29: Poster

Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer

Status of the Development of a HPGe-BGO Pair Spectrometer for ELI-NP — •Ilja Homm, Alexander Ignatov, Stoyanka Ilieva, and Thorsten Kröll — Technische Universität Darmstadt, Germany

At the moment, the new european research facility called ELI-NP (The Extreme Light Infrastructure - Nuclear Physics) is being built in Bucharest-Magurele, Romania. ELI-NP offers unprecedented opportunities for photonuclear reactions with high intensity, brilliant and fully polarized photon beams at energies up to 19.5 MeV.

The 8 HPGe CLOVER detectors of ELIADE are important instruments for the gamma spectroscopic study of photonuclear reactions. We investigate the possibility to operate an advanced version of an anti-Compton shield (AC shield) as escape γ-rays pair spectrometers for two of the ELIADE CLOVERS to extend the high-resolution spectroscopy to photon energies of several MeV where the pair production process dominates. The BGO shield operated as a stand-alone device can be used as intensity monitor too. The main tasks are to develop and test such an AC shield: a pair spectrometer consisting of BGO and CsI(Tl) crystals with APD (avalanche photodiode) or SiPM (silicon photomultiplier) readout. The results of prototype testing are reported.
This work is supported by the German BMBF (05P15RDENA).