Photon detectors for epithermal neutron scattering at high-w and low-q

Inelastic epithermal neutron scattering at high energy ((h) over bar omega >= 1 eV) and low wave vector (q <= 10 angstrom(-1)) transfers is the unique technique for the investigation of high-energy excitations in a variety of systems, ranging from magnetic materials to semiconductors. The key issue in order to make these measurements feasible on inverse geometry spectrometers, is to develop suitable detection systems for neutrons in the energy range 12100 eV: The Resonance Detector Spectrometer configuration has to be considered as the most promising approach for electron Volt neutron spectroscopy. This configuration will be employed in the new low angle detector bank, VLAD, planned for VESUVIO spectrometer operating at ISIS source.