Article

# AGATA: Gamma-ray tracking in segmented HPGe detectors

11/2008; DOI:PoS VERTEX2008:040,2008
Source: arXiv

ABSTRACT The next generation of radioactive ion beam facilities, which will give experimental access to many exotic nuclei, are presently being developed. At the same time the next generation of high resolution gamma-ray spectrometers, based on gamma-ray tracking, for studying the structure of these exotic nuclei are being developed. One of the main differences in tracking of $\gamma$ rays versus charged particles is that the gamma rays do not deposit their energy "continuously" in the detector, but in a few discrete steps. Also, in the field of nuclear spectroscopy, the location of the source is mostly well known while the exact interaction position in the detector is the unknown quantity. This makes the challenges of gamma-ray tracking in germanium somewhat different compared to vertexing in silicon detectors. In these proceedings we present the methods for determining the 3D interaction positions in the detector and how these are used to reconstruct the gamma-ray tracks in the AGATA detector array. We also present preliminary simulation results of a proposed in-beam method to measure the interaction position resolution in the germanium detectors. Comment: 10 pages, 6 figures. To appear in the proceedings of 17th International Workshop on Vertex detectors July 28 - 1 August 2008 Uto Island, Sweden

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### Keywords

$\gamma$ rays

1 August 2008 Uto Island

17th International Workshop

3D interaction positions

AGATA detector array

discrete steps

exact interaction position

exotic nuclei

gamma rays

gamma-ray tracks

germanium detectors

interaction position resolution

next generation

nuclear spectroscopy

proposed in-beam method

resolution gamma-ray spectrometers

silicon detectors

unknown quantity

Vertex detectors July 28