Characterization and performance of the DTAS detector

Abstract

DTAS 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 \b{eta}-delayed neutron emitting nuclei.

References in corpus (4)

• Total Absorption Spectroscopy Study of ${}^{92}$Rb Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape
• Total Absorption Gamma-Ray Spectroscopy of 87Br, 88Br and 94Rb Beta-Delayed Neutron Emitters
• Enhanced Gamma-Ray Emission from Neutron Unbound States Populated in Beta Decay
• Total Absorption Spectroscopy Study of the Beta Decay of ${}^{86}$Br and ${}^{91}$Rb

Cited by in corpus (6)

• Beta-decay studies for applied and basic nuclear physics
• Total absorption $\gamma$-ray spectroscopy of niobium isomers
• Reactor antineutrino flux and anomaly
• Total absorption $\gamma$-ray spectroscopy of the $\beta$-delayed neutron emitters ${}^{137}$I and ${}^{95}$Rb
• Determination of Beta Decay Ground State Feeding of Nuclei of Importance for Reactor Applications
• Development of a Reference Database for Beta-Delayed Neutron Emission