Speaker
Description
Neutron and γ-ray dual mode sensitivity is a widely utilized detector capability for nuclear security applications and fundamental nuclear physics measurements, such as neutron scattering and $\beta$-delayed neutron emission. In particular, the pulse-shape discrimination (PSD) technique exploitable with Cs$_{2}$$^{6}$LiYCl$_{6}$:Ce (C$^{6}$LYC) scintillators permits simultaneous measurements of neutrons and γ rays from inelastic neutron scattering reactions. C$^{6}$LYC also provides a relatively broad dynamic range in neutron energy that usually requires multiple detector types to attain. Recent developments of new elpasolite scintillators has led to Tl$_{6}$$^{6}$LiYCl$_{6}$:Ce (T$^{6}$LYC), a variant of C$^{6}$LYC with thallium replacing cesium ions for higher effective $Z ( Z_{eff} = 69 )$. This work focuses on characterizing the properties of T$^{6}$LYC using standard γ-ray calibration sources, an unmoderated $^{252}$Cf fission chamber, and in-beam neutron scattering on $^{12}$C. Performance comparisons of T$^{6}$LYC relative to C$^{6}$LYC detectors from the Correlated Gamma-Neutron Array for sCattering (CoGNAC) at Los Alamos National Laboratory will be presented.
