The recently developed Cs2LiYCl6:Ce (CLYC) crystals are interesting scintillation detectors not only for their gamma energy resolution (<5% at 662 keV) but also for their capability to identify and measure the energy of both gamma rays and fast/thermal neutrons. The thermal neutrons were detected by the6Li(n,α)t reaction while for the fast neutrons the35Cl(n,p)35S and35Cl(n,α)32P neutron-capture reactions were exploited. The energy of the outgoing proton or α particle scales linearly with the incident neutron energy. The kinetic energy of the fast neutrons can be measured using both the Time Of Flight (TOF) technique and using the CLYC energy signal. In this work, the response to monochromatic fast neutrons (1.9-3.8 MeV) of two CLYC 1"×1" crystals was measured using both the TOF and the energy signal. The observables were combined to identify fast neutrons, to subtract the thermal neutron background and to identify different fast neutron-capture reactions on35Cl, in other words to understand if the detected particle is an α or a proton. We performed a dedicated measurement at the CN accelerator facility of the INFN Legnaro National Laboratories (Italy), where the fast neutrons were produced by impinging a proton beam (4.5, 5.0 and 5.5 MeV) on a7LiF target. We tested a CLYC detector6Li-enriched at about 95%, which is ideal for thermal neutron measurements, in parallel with another CLYC detector7Li-enriched at more than 99%, which is suitable for fast neutron measurements.
|Pages (from-to)||51 - 61|
|Number of pages||11|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 21 Jul 2016|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Giaz, A., Blasi, N., Boiano, C., Brambilla, S., Camera, F., Cattadori, C., Ceruti, S., Gramegna, F., Marchi, T., Mattei, I., Mentana, A., Million, B., Pellegri, L., Rebai, M., Riboldi, S., Salamida, F., & Tardocchi, M. (2016). Fast neutron measurements with. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 825, 51 - 61. https://doi.org/10.1016/j.nima.2016.03.090