Ce:LaBr3 crystal (also known as cerium-doped lanthanum bromide crystal) is one of the new generation of gamma radiation detector materials based on inorganic scintillators. Its emission spectrum is in the range of 360nm-410nm, which matches well with the sensitive wavelength range of the photomultiplier tube (PMT) and silicon photodiode (PD).

The Ce:LaBr3 crystal shows stable chemical properties. Its refractive index is close to that of the photomultiplier tube, and it shows excellent scintillating performance, such as high energy resolution, high light output (61000ph/Mev), and fast decay time (about 30ns).  Which is an ideal substitute for the traditional scintillation crystal NaI. Ce: LaBrcrystals are widely used in photomultiplier tubes, photocounters, scintillating screens and other devices to detect high-energy gamma rays. Because of the excellent scintillation properties of Ce:LaBr3 crystal, it has been widely used in nuclear physics, geophysics, petroleum exploration, medical imaging.


Parameter

Material features

Property Value
MaterialsLaBr3
Density (g/cm3)5.2
Melting point (℃)1116
Hardness (Mohs)3
Molar mass378.62 g/mol
Appearancewhite solid, hygroscopic
Boiling point1,577 °C (2,871 °F; 1,850 K
Solubility in waterVery soluble

Scintillator properties

PropertyValue
Coordination geometryTricapped trigonal prismatic
Decay time (ns)25
Light yield (photons/keV)63
Crystal structurehexagonal
Radiation length (cm)1.881
Attenuation(mm)@511keV22
Emission peak wavelength(nm)370
Reflection loss/surface (%)6.8
Radiation Length(g·cm-2)9.95
Moliere Radius(cm)2.816
Energy resolution(%)@662keV2.9

Feature

  • Chemical inert
  • Fast decay time
  • High scintillating efficiency 
  • High sensitivity,
  • High energy resolution

Application

  • γ-ray detection
  • X-ray medical imaging
  • Nuclear physics
  • Nuclear radiation detection
  • Geophysics
  • Petroleum exploration

Spertrum

Reference

[1]  Fabbri A ,  Cencelli V O ,  Bennati P , et al. Dual isotope imaging with LaBr3:Ce crystal and H8500 PSPMT[J]. Journal of Instrumentation, 2013, 8(02):C02022.
[2]  Tain J L ,  Agramunt J ,  Algora A , et al. The sensitivity of LaBr3:Ce scintillation detectors to low energy neutrons: Measurement and Monte Carlo simulation[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015, 774:17-24.
[3]  Khodyuk I V ,  Alekhin M S , JTMD Haas, et al. Improved scintillation proportionality and energy resolution of LaBr3:Ce at 80K[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011, 642( 1):75-77.

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