Optimizing Cs2LiYCl6 for fast neutron spectroscopy

Fast neutron response of 6Li-depleted CLYC detectors up to 20MeV

“…It can also be seen that there is no longer a large thermal peak that interferes with the spectra, as could be seen in Ref. [10]. While the small bumps below the main peaks in the spectra for 1.80 MeV and 2.01 MeV neutrons are believed to be primarily due to scattered neutron background, a secondary peak can be seen to begin taking shape in the spectrum for 2.69 MeV neutrons.…”

“…As described in previous work [10], the thermal neutron peak from the 6 Li(n,α) reaction, which appears at a gamma-equivalent energy of $ 3.5 MeV, is an impediment for spectroscopy of neutrons above $ 2.5 MeV, as they become obscured by the large thermal peak. Crystals enriched in 7 Li can improve the neutron spectroscopic capabilities of CLYC by suppressing the thermal neutron response.…”

“…Signal traces were analyzed off-line to extract pulse-height and PSD parameters. Pulse-shape discrimination was carried out using the charge comparison method by taking the ratio of a long and short integration region of the pulse [10]. The optimal integration lengths were chosen based on a figure-of-merit, and found to be 72 ns for the short gate and 580 ns for the long gate.…”

“…While thermal neutron detection through the 6 Li(n,α) reaction has been the primary focus of study for CLYC [6][7][8], its application in fast neutron detection and spectroscopy has only recently been investigated [9][10][11][12]. Fast neutron detection is based on the 35 Cl(n, p) 35 S reaction.…”

First γ-Decay Studies with CARIBU Low-Energy Exotic Beams

“…An array of Cs 2 LiYCl 6 :Ce (CLYC) inorganic scintillator detectors is under construction for this purpose [5]. CLYC detectors have shown promise as thermal neutron detectors due to their pulse-shape discrimination for neutrons and γ rays, and their high energy resolution.…”