Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 58: Instrumentierung

HK 58.8: Vortrag

Freitag, 21. März 2014, 12:45–13:00, HZ 10

Gamma ray tracking with the AGATA demonstrator — •Benedikt Birkenbach, Herbert Hess, Lars Lewandowski, Peter Reiter, Tim Steinbach, David Schneiders, and Andreas Vogt for the AGATA collaboration — IKP, Universität zu Köln

The performance of the AGATA demonstrator will be discussed based on data taken from a multi-nucleon transfer experiment at the AGATA PRISMA setup at LNL (INFN, Italy). A primary ¹³⁶Xe beam of 1 GeV hitting a ²³⁸U target was used to produce a multitude of nuclei in the vicinity of ¹³⁶Xe and corresponding reaction partners in the actinide region. The obtained results for in-beam gamma-ray spectroscopy allow for a critical assessment of the novel gamma ray tracking technique and comparison with standard procedure. High resolution spectroscopy of both reaction products after multi-nucleon transfer reaction in the presence of a high background from excited fission fragments is based on pulse-shape analysis (PSA) and gamma-ray tracking (GRT). The quality of the position information is crucial for the final energy resolution after Doppler correction. The impact of the calculated PSA libraries and the initial detector characterization for the PSA and GRT are summarized. Details of the achieved position and energy resolution, peak-to-background optimization are presented and illustrated with results from the neutron-transfer products in Xe and U-isotopes. Supported by the German BMBF (05P12PKFNE TP4), ENSAR-TNA03.