New approach to neutron spectrometry with multi element scintillator

• Elpasolite scintillator CLYC.
• The scintillator mounted on a photomultiplier has been tested with different gamma and fast neutrons.
• The response functions of the detector have been measured.
• Monte Carlo simulations have been performed.
• The experimental and simulation data have been presented.

A recently developed scintillator has been investigated for possible use as a dual detector for neutron and gamma spectrometry. A 7Li-enriched version of the scintillator has been investigated. The 35Cl(n,p)35S nuclear reaction provides a possibility for fast neutron detection. The sensor has been mounted on a photomultiplier tube controlled with a miniature electronics board and irradiated in different gamma and neutron radiation fields. A series of experiments has been carried out with different gamma energies as well as well with mono-energetic neutrons from a KN Van de Graaff accelerator, and the pulse height spectra have been measured. To clarify different features observed on the response functions of the detector, a Monte Carlo model of the scintillator has been built using MCNP6 and emitted charged particles have been tracked. The simulation data along with the experiments are analyzed, compared and reported.