Title: Neutron measurements with lanthanum-bromide scintillation detectors - A first approach
Authors: OBERSTEDT AndreasBILLNERT ROBERTOBERSTEDT Stephan
Citation: NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 708 p. 7-14
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2013
JRC N°: JRC71247
ISSN: 0168-9002
URI: http://www.sciencedirect.com/science/article/pii/S0168900213000466
http://publications.jrc.ec.europa.eu/repository/handle/JRC71247
DOI: 10.1016/j.nima.2013.01.005
Type: Articles in periodicals and books
Abstract: In this paper we report on the measurement of gamma-rays with a 2in. x 2in. LaBr3:Ce scintillation detector. The gamma-rays were emited in the spontaneous fission of Cf-252 and the reaction U-235 (nth,f), respectively, and detected in coincidence with fission fragments. After presenting some of the properties of the detector, we show how well gamma-rays produced in different reactions may easily be distinguished by their characteristic time-of-flight. Then we focus on the analysis of gamma-rays from inelastically scattered neutrons in the scintillation crystal and demonstrate how this information may be used for neutron spectroscopy. We determine the neutron detection efficiency and compare it to the result of calculations based on existing reaction cross sections. We also give a first example for an application, where the spectrum of fission neutrons is assessed. Finally, we discuss the detection performance in relation to other detector systems, commonly used for neutron monitoring.
JRC Directorate:Health, Consumers and Reference Materials

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