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Discrimination of gamma rays due to inelastic neutron scattering in AGATA
Department of Physics, Ankara University, 06100 Tandogan, Ankara, Turkey. (nuclear physics)
Department of Physics, Ankara University, 06100 Tandogan, Ankara, Turkey.
Department of Physics, Ankara University, 06100 Tandogan, Ankara, Turkey.
Department of Physics, Ankara University, 06100 Tandogan, Ankara, Turkey.
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2009 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 607, no 3, 554-563 p.Article in journal (Refereed) Published
Abstract [en]

Possibilities of discriminating neutrons and γ rays in the AGATA γ-ray tracking spectrometer have been investigated with the aim of reducing the background due toinelastic scattering of neutrons in the high-purity germanium crystals. This background may become a serious problem especially in experiments with neutron-rich radioactive ion beams. Simulations using the Geant4 toolkit and a tracking program based on the forward tracking algorithm were carried out by emitting neutrons and γ rays from the center of AGATA. Three different methods were developed and tested in order to find "fingerprints" of the neutron interaction points in the detectors. In a simulation with simultaneous emission of six neutrons with energies in the range 1-5 MeV and 10 γ rayswith energies between 150 and 1450 keV, the peak-to-background ratio at a γ-ray energy of 1.0 MeV was improved by a factor of 2.4 after neutron rejection with a reduction of the photopeak efficiency at 1.0 MeV of only a factor of 1.25. 

Place, publisher, year, edition, pages
2009. Vol. 607, no 3, 554-563 p.
Keyword [en]
AGATA, Gamma-ray tracking, Geant4 Monte Carlo simulations, HPGe detectors, Inelastic neutron scattering, Neutron-gamma discrimination
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:kth:diva-80931DOI: 10.1016/j.nima.2009.05.183ISI: 000269402900010OAI: oai:DiVA.org:kth-80931DiVA: diva2:496960
Note
QC 20120214Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2017-12-07Bibliographically approved

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