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The Resonance Detector Spectrometer was recently revised for neutron spectroscopic studies in the eV energy region. In this technique one makes use of a photon detector to record the gamma emission from analyser foils used as neutron-gamma converters. The pulse-height response of a Cadmium-Zinc-Telluride photon detector to neutron capture emission from U-238 and Au-197 analyser foils was characterised in the neutron energy range 1-200 eV. The experiment was performed on the VESUVIO spectrometer at the ISIS neutron-pulsed source. A biparametric data acquisition, specifically developed for these measurements, allowed the simultaneous measurements of both the neutron time of flight and gamma pulse-height spectra. Through the analysis of the gamma pulse-height spectra the main components of the signal associated with resonant and non-resonant neutron absorption were identified. It was also shown that, in principle, energy discrimination can be used to improve the signal to background ratio of the neutron time-of-flight measurement. (C) 2004 Elsevier B.V. All rights reserved.

Tardocchi, M., Pietropaolo, A., Andreani, C., Bracco, A., D'Angelo, A., Gorini, G., et al. (2004). Cadmium-Zinc-Telluride photon detector for epithermal neutron spectroscopy: pulse height response characterisation. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 526(3), 477-492 [10.1016/j.nima.2004.02.040].

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