CLLBC Gamma-Neutron Scintillator

CLLBC (Cs2LiLa(Br,Cl)6:Ce): a dual-mode gamma-neutron scintillator can be used as a replacement for both high energy resolution gamma-ray detectors and high pressure Helium-3 tubes for neutron detection. The ease of using pulse height as well as pulse shape discrimination (PSD) for neutron detection, combined with gamma-ray energy resolution better than Thallium-doped Sodium Iodide (NaI:Tl) or Thallium-doped Caesium Iodide (CsI:Tl) and in the working range of Cerium-doped Lanthanium Bromide (LaBr3:Ce), make it an ideal solution for several classes of handheld instruments, including Spectroscopic Personal Radiation Detectors (SPRDs) and Radionuclide Identification Devices (RIIDs).


It can be packaged with a temperature sensor and a SiPM array. The resulting CLLBC-SiPM sensor offers a compact and low voltage requirement reliable signal for neutron detection and gamma-ray spectroscopy.

Contact RMD

  • Material: Cs2LiLa(Br,Cl)6:Ce
  • Melting Point: 540°C
  • Density: 4 g/cm3
  • Crystal Structure: Cubic
  • Cleavage Planes: None
  • Water Solubility: Hygroscopic
  • Emission Spectral Range: 350 – 450 nm
  • Peak Scintillation Wavelength: 410 nm
  • Decay Constants (Ce3+, Ce-STE): 115 ns, 500 ns,1500 ns
  • Scintillation Light Yield: 45,000 ph/MeV
  • GEE for Thermal Neutrons: 3.1 MeV
  • X-ray Absorption Coef. at 100 KeV: 5.49 cm-1
  • X-ray Absorption Coef. at 662 KeV: 0.298 cm-1
  • Radiation Length: 2.45 cm


  • 25mm diameter/25mm long cylinder
  • 38mm diameter/38mm long cylinder
  • 50mm diameter/50mm long cylinder

Package Style

  • Sealed package, one end window
  • Sealed package and permanently mounted to a photomultiplier tube (PMT)
  • Permanently packaged with Silicon Photomultiplier (SiPM) array(s) and temperature sensor

Energy Resolution

<= 4% FWHM
(measured at 22oC on a reference PMT with a superbialkali photocathode)