In this paper it is shown that solid-state cadmium-zinc-telluride (CZT) is a promising photon detector for neutron spectroscopy in a wide energy interval, ranging from thermal (similar to25 meV) to epithermal (similar to70 eV) neutron energies. In the present study two CZT detectors were tested as part of the inverse-geometry neutron spectrometer VESUVIO operating at the ISIS pulsed neutron source. The response of the CZT detector to photon emission from radiative neutron capture in U-238 was determined by biparametric measurements of neutron time of flight and photon energy. The scattering response function F(y) from a Pb sample has been derived using both CZT and conventional Li-6-glass scintillator detectors. The former showed both an improved signal to background ratio and higher efficiency as compared to Li-6 glass, allowing us to measure F(y) up to the fourth U-238 absorption energy (E-r=66.02 eV). Due to the small size of CZT detectors, their use is envisaged in arrays, with high spatial resolution, for neutron-scattering studies at high energy ((h) over bar omega>1 eV) and low wavevector (q<10 \&ANGS;(-1)) transfers.
Andreani, C., D'Angelo, A., Gorini, G., Imberti, S., Pietropaolo, A., Rhodes, N., et al. (2004). CdZnTe gamma detector for deep inelastic neutron scattering on the VESUVIO spectrometer. APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING, 78(6), 903-913 [10.1007/s00339-003-2087-7].
CdZnTe gamma detector for deep inelastic neutron scattering on the VESUVIO spectrometer
ANDREANI, CARLA;D'ANGELO, ANNALISA;IMBERTI, SILVIA;PIETROPAOLO, ANTONINO;SENESI, ROBERTO;
2004-01-01
Abstract
In this paper it is shown that solid-state cadmium-zinc-telluride (CZT) is a promising photon detector for neutron spectroscopy in a wide energy interval, ranging from thermal (similar to25 meV) to epithermal (similar to70 eV) neutron energies. In the present study two CZT detectors were tested as part of the inverse-geometry neutron spectrometer VESUVIO operating at the ISIS pulsed neutron source. The response of the CZT detector to photon emission from radiative neutron capture in U-238 was determined by biparametric measurements of neutron time of flight and photon energy. The scattering response function F(y) from a Pb sample has been derived using both CZT and conventional Li-6-glass scintillator detectors. The former showed both an improved signal to background ratio and higher efficiency as compared to Li-6 glass, allowing us to measure F(y) up to the fourth U-238 absorption energy (E-r=66.02 eV). Due to the small size of CZT detectors, their use is envisaged in arrays, with high spatial resolution, for neutron-scattering studies at high energy ((h) over bar omega>1 eV) and low wavevector (q<10 \&ANGS;(-1)) transfers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
