Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Instrumentierung IV

HK 22.1: Gruppenbericht

Dienstag, 16. März 2010, 14:00–14:30, HG IX

First results from the Advanced GAmma Tracking Array Demonstrator — •Andreas Wiens1, Benedikt Birkenbach1, Bart Bruyneel1, Juergen Eberth1, Herbert Hess1, Daniel Lersch1, George Pascovici1, Peter Reiter1, and Heinz-Georg Thomas21IKP, Universität zu Köln — 2CTT, Montabaur

The Advanced Gamma Ray Tracking Array, a 4π γ-ray spectrometer, is based on the principle of gamma-ray tracking which provides an optimal energy resolution, a very high efficiency and a position sensitivity of a few millimeters for energy depositions after γ-ray interactions. The AGATA demonstrator started operation at LNL Legnaro after commissioning experiments employing the complete detection sequence. Four AGATA triple cluster detectors comprising each three highly segmented HPGe detectors are operated together with electronics digitizing the acquired pulses. Online pulse shape analysis is successfully used to determine the positions of the γ-ray interaction points. The energies and coordinates of coincident interactions are processed by the tracking algorithm. The tracking procedure is validated by demonstrating an improved energy resolution after Doppler correction. Different type of nuclear reactions were exploited at Legnaro to study coincidences between charged particle detectors or the PRISMA spectrometer and the AGATA demonstrator array. Latest results of the first in-beam experiments will be presented. Supported by the German BMBF(06K-167, 06KY205I)

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