Lanthanum Bromide Scintillation Radiation Detectors

Lanthanum Bromide LaBr3(Ce) Scintillation Radiation Detector
  • High light output, and fast decay time output pulse.
  • Better energy resolution and stability than NaI(Tl).
  • Higher maximum throughput at high input count rates.
Lanthanum Bromide, or LaBr3(Ce), is one of the new generation of inorganic scintillation gamma-ray detectors. LaBr detectors exhibit improved resolution and faster light decay time.

When used with the latest ORTEC digital electronics, these detectors provide improved resolution, pulse shape, and temperature stability compared to NaI(Tl) types.
  • Literature +

  • More Information +


    Lanthanum Bromide Scintillation Radiation Detector ComparisonImproved Resolution and Efficiency
    As shown in Figure 1, LaBr provides better resolution performance over NaI(Tl) systems by approximately a factor of 2. Note that neither the NaI(Tl) detectors nor the lanthanum bromide detectors can approach the resolution of a HPGe detector. The efficiency for LaBr is about 1.3 times that of NaI(Tl) for the same volume and the decay time constant is slightly more than 10% of the NaI detector decay time (see Table 1). On the basis of photoelectron yield, LaBr has higher efficiency and temperature stability than NaI(Tl).

    High Count Rate Compatibility
    Lanthanum bromide detectors can operate over wide dynamic ranges of count rate with little variation in energy resolution.
    Detector Type Resolution @622 keV (%) Density (g/cc) Photoelectron Yield Relative to NaI Primary Decay Time (usec)
    LaBR3(Ce) 2.8 - 4.0 5.29 130 0.026
    NaI(Tl) 7 3.7 100 0.230
    HPGe 0.2 (1.3 keV) 5.35 N/A N/A


    Figures 2 and 3 show high rate performance of a LaBr detector with an ORTEC digiBASE.
    Lanthanum Bromide Scintillation Radiation Detector throughput count rate resolution

    The digiBASE shows minimal resolution degradation over a wide range of count rates.
  • Specifications +


    Dimensions and Weights

    Model Base OD PMT OD Detector Housing OD Detector Housing Length Overall Length Net Weight Shipping Weight
    LABR-1x1 57 mm
    2.2 in
    44.5 mm
    1.8 in
    30.4 mm
    1.2 in
    26.1 mm
    1.0 in 
    143 mm
    5.6 in
    +pins
    ~.06 lb 5 lb
    LABR-1.5x1.5 58.7 mm
    2.3 in
    58.7 mm
    2.3 in
    43.1 mm
    1.7 in
    39 mm
    1.5 in
    151.5 mm
    6.0 in
    +pins
    ~1 lb 5 lb
    LABR-2x2 58.7 mm
    2.3 in
    58.7 mm
    2.3 in
    55.8 mm
    2.2 in
    51.5 mm
    2.0 in
    164 mm
    6.5 in
    +pins
    ~1.5 lb 5 lb
    LABR-3x3 58.7 mm
    2.3 in
    58.7 mm
    2.3 in
    82.5 mm
    3.2 in
    157 mm
    6.2 in
    194 mm
    7.6 in
    +pins
    ~2 lb 5 lb

    Spectroscopy Electronics

    Electronics  PMT Base/Preamp Amplifier MCB HVPS Comments
    digiBASE or DigiBASE-E Included Included Included Included Simplest System - requires computer
    digiDart or digiDART-LF with DIM-296 Included Included Included Included Portable applications with or without computer
    NIM Solution with 296 PMT Base Included NIM* MCB** Included Requires NIM Bin/Power and computer. Energy and timing can be simultaneous.
    NIM Solution with 276 PMT Base Included NIM* MCB** 556 Requires NIM Bin/Power and computer. Energy and timing can be simultaneous.
    NIM Solution with 266 PMT Base and 113 Preamplifier Included NIM* MCB** 556 Requires computer. Energy and timing can be simultaneous

    *Choice of NIM amplifier: 855, 575A, 570, 590A, 671, 672, 572A
    ** Choice of MCB: EASY-MCA-2K, EASY-MCA-8K, 920E
  • Ordering Information +


    Model Description
    LABR-1x1 LaBr3(Ce) scintillation detector, 1 x 1-in. crystal with 1.5-in. diameter 14-pin PMT; resolution 3.5% guaranteed. St. Gobain Part No. 2-4-7174
    LABR-1.5x1.5
    LaBr3(Ce) scintillation detector, 1.5 x 1.5-in. crystal with 2-in. diameter 14-pin PMT; resolution 3.0% target. St. Gobain Part No. 2-4-6115.
    LABR-2x2
    LaBr3(Ce) scintillation detector, 2 x 2-in. crystal with 2-in. diameter 14-pin PMT; resolution 3.5% target. St. Gobain Part No. 2-4-6288.
    LABR-3x3
    LaBr3(Ce) scintillation detector, 3 x 3-in. crystal with 3-in. diameter 14-pin PMT; resolution 3.5% target. St. Gobain Part No. 2-4-7175.