Steinbach, T., Hirsch, R., Reiter, P., Birkenbach, B., Bruyneel, B., Eberth, J., Gernhaeuser, R., Hess, H., Lewandowski, L., Maier, L., Schlarb, M., Weiler, B. and Winkel, M. (2017). Compton imaging with a highly-segmented, position-sensitive HPGe detector. Eur. Phys. J. A, 53 (2). NEW YORK: SPRINGER. ISSN 1434-601X
Full text not available from this repository.Abstract
A Compton camera based on a highly-segmented high-purity germanium (HPGe) detector and a double-sided silicon-strip detector (DSSD) was developed, tested, and put into operation; the origin of gamma radiation was determined successfully. The Compton camera is operated in two different modes. Coincidences from Compton-scattered gamma-ray events between DSSD and HPGe detector allow for best angular resolution; while the high-efficiency mode takes advantage of the position sensitivity of the highly-segmented HPGe detector. In this mode the setup is sensitive to the whole 4 pi solid angle. The interaction-point positions in the 36-fold segmented large-volume HPGe detector are determined by pulse-shape analysis (PSA) of all HPGe detector signals. Imaging algorithms were developed for each mode and successfully implemented. The angular resolution sensitively depends on parameters such as geometry, selected multiplicity and interaction-point distances. Best results were obtained taking into account the crosstalk properties, the time alignment of the signals and the distance metric for the PSA for both operation modes. An angular resolution between 13.8 degrees and 19.1 degrees, depending on the minimal interaction-point distance for the high-efficiency mode at an energy of 1275 keV, was achieved. In the coincidence mode, an increased angular resolution of 4.6 degrees was determined for the same gamma-ray energy.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| URN: | urn:nbn:de:hbz:38-239852 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DOI: | 10.1140/epja/i2017-12214-9 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Eur. Phys. J. A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Volume: | 53 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Number: | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Date: | 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Publisher: | SPRINGER | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Place of Publication: | NEW YORK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ISSN: | 1434-601X | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Language: | English | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Subjects: | no entry | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Refereed: | Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| URI: | http://kups.ub.uni-koeln.de/id/eprint/23985 |
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