Deep inelastic neutron scattering on 207Pb and NaHF2 as a test of a detectors array on the VESUVIO spectrometer

Abstract

A prototype array of resonance detectors for deep inelastic neutron scattering experiments has been installed on the VESUVIO spectrometer, at the ISIS spallation neutron source. Deep inelastic neutron scattering measurements on a reference lead sample and on NaHF 2 molecular system are presented. Despite on an explorative level, the results obtained for the values of mean kinetic energy hE k i are found in good agreement with the theoretical predictions, thus assessing the potential capability of the device for a routine use on the instrument. r

A silicon photomultiplier readout for time of flight neutron spectroscopy with γ-ray detectors

“…Indeed, YAP detectors and PMTs have been successfully employed for other applications of neutron spectroscopy. [10][11][12] YAP is a nonhygroscopic crystal and easy to be machined in different shapes. Its effective atomic number Z eff =36 and density = 5.55 g cm −3 provide a good efficiency ͑10% at 1 MeV͒, the appreciable light yields ͑18000 photons/MeV͒ a sufficient energy resolution and its fast decay time ͑ =27 ns͒ is a reliable use for TOF neutron spectroscopy.…”