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Characterization and performance of the DTAS detector

AuthorsGuadilla Gómez, Víctor ; Tain, José Luis; Algora, Alejandro ; Agramunt, Jorge ; Äystö, J.; Briz, Jose Antonio; Cucoanes, A.; Eronen, T.; Estienne, M.; Fallot, M.; Fraile, L. M.; Ganioglu, E.; Gelletly, W.; Gorelov, D.; Hakala, J.; Jokinen, A.; Jordan, D.; Kankainen, A.; Kolhinen, V.; Koponen, J.; Lebois, M.; Le Meur, L.; Martinez, T.; Monserrate, Manuel; Montaner-Pizá, A. ; Moore, I.; Nácher, Enrique ; Orrigo, S. E. A. ; Penttilä, H.; Pohjalainen, I.; Porta, A.; Reinikainen, J.; Reponen, M.; Rice, S.; Rinta-Antila, S.; Rubio, Berta Rytkönen, K.; Shiba, T.; Sonnenschein, V.; Sonzogni, A. A.; Valencia, Ebhelixes ; Vedia, V.; Voss, A.; Wilson, J. N.; Zakari-Issoufou, A. A.
Keywordsy-ray spectrometer
Non-proportional scintillation light yield: Monte Carlo simulations
NaI(Tl) detector
Exotic nuclei
B decay
Total absorption
Issue Date5-Sep-2018
PublisherElsevier BV
CitationNuclear instruments & methods inphysics research section A: Accelerators spectrometers detectors and associated equipment 910: 79-89 (2018)
AbstractDTAS is a segmented total absorption γ-ray spectrometer developed for the DESPEC experiment at FAIR. It is composed of up to eighteen NaI(Tl) crystals. In this work we study the performance of this detector with laboratory sources and also under real experimental conditions. We present a procedure to reconstruct offline the sum of the energy deposited in all the crystals of the spectrometer, which is complicated by the effect of NaI(Tl) light-yield non-proportionality. The use of a system to correct for time variations of the gain in individual detector modules, based on a light pulse generator, is demonstrated. We describe also an event-based method to evaluate the summing-pileup electronic distortion in segmented spectrometers. All of this allows a careful characterization of the detector with Monte Carlo simulations that is needed to calculate the response function for the analysis of total absorption γ-ray spectroscopy data. Special attention was paid to the interaction of neutrons with the spectrometer, since they are a source of contamination in studies of β-delayed neutron emitting nuclei.
Description11 pags., 16 figs., 3 tabs.
Publisher version (URL)http://dx.doi.org/10.1016/j.nima.2018.09.001
Identifiersdoi: 10.1016/j.nima.2018.09.001
issn: 0168-9002
Appears in Collections:(IFIC) Artículos
(CFMAC-IEM) Artículos
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