gamma-ray tracking in germanium: the backtracking method
2002 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 477, no 03-jan, 391-396 p.Article in journal (Refereed) Published
In the framework of a European TMR network project the concept for a gamma-ray tracking array is being developed for nuclear physics spectroscopy in the energy range of similar to 10 keV up to several MeV. The tracking array will consist of a large number of position-sensitive germanium detectors in a spherical geometry around a target. Due to the high segmentation, a Compton scattered gamma-ray will deposit energy in several different segments. A method has been developed to reconstruct the tracks of multiple coincident gamma-rays and to find their initial energies. By starting from the final point the track can be reconstructed backwards to the origin with the help of the photoelectric and Compton cross-sections and the Compton scatter formula. Every reconstructed track is given a figure of merit, thus allowing suppression of wrongly reconstructed tracks and gamma-rays that have scattered out of the detector system. This so-called backtracking method has been tested on simulated events in a shell-like geometry for germanium and in planar geometries for silicon, germanium and CdTe.
Place, publisher, year, edition, pages
2002. Vol. 477, no 03-jan, 391-396 p.
tracking, gamma-ray spectroscopy, spectrometer
IdentifiersURN: urn:nbn:se:kth:diva-21324ISI: 000173886100068OAI: oai:DiVA.org:kth-21324DiVA: diva2:340022
QC 201005252010-08-102010-08-10Bibliographically approved