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ORTEC ®Lanthanum BromideScintillation DetectorsNew Generation Inorganic Scintillators:• High Light output, and fast decay time output pulse.• Better energy resolution and stability than NaI(Tl).• Higher maximum throughput at high input countrates.Lanthanum Bromide, or LaBr3(Ce), sometimes simply (andincorrectly) referred to as “LaBr”, is one of the new generation ofinorganic scintillation gamma-ray detectors. LaBr detectors exhibitimproved resolution and faster light decay time.When used with the latest ORTEC digital electronics, thesedetectors provide improved resolution, pulse shape, andtemperature stability compared to NaI(Tl) types. As a convenienceto our customers, ORTEC is pleased to offer various LaBr detectormodels.Crystals sizes for the spectroscopy systems range from 1 x 1-in. to3 x 3-in.Improved Resolution andEfficiencyAs shown in Figure 1, LaBr providesbetter resolution performance over NaI(Tl)systems by approximately a factor of 2.Note that neither the NaI(Tl) detectors northe lanthanum bromide detectors canapproach the resolution of a HPGedetector.The efficiency for LaBr is about 1.3 timesthat of NaI(Tl) for the same volume andthe decay time constant is slightly morethan 10% of the NaI detector decay time(see Table 1). On the basis ofphotoelectron yield, LaBr has higherefficiency and temperature stability thanNaI(Tl).26 keV662 keV 1332 keV59 keV1460 keV 1836 keVFigure 1. Comparison for LaBr 3 (Ce), NaI(Tl), and HPGe spectra.High Count RateCompatibilityLanthanum bromide detectors can operate over widedynamic ranges of count rate with little variation inenergy resolution.Figures 2 and 3 show high rate performance of aLaBr detector with an ORTEC digiBASE.The digiBASE shows minimal resolution degradationover a wide range of count rates.Table. 1. Comparison of Critical Parameter for Lanthanum Bromide Detectors.DetectorTypeResolution@662 keV (%)Density(g/cc)Photoelectron YieldRelative to NaIPrimary DecayTime (μsec)LaBr 3 (Ce) 2.8—4.0 5.29 130 0.026NaI(Tl) 7 3.7 100 0.230HPGe 0.2 (1.3 keV) 5.35 N/A N/A

Lanthanum BromideScintillation DetectorsFigure 2. Figure 3.Spectroscopy Electronics for LaBrLanthanum bromide crystals are generally supplied ready mounted on a PMT in the form of an integrated assembly. Many options areavailable to develop a complete spectroscopy system.Electronics PMT Base/Preamp Amplifier MCB HVPS CommentsIncluded in digiBASE Included in digiBASE digiBASE or included in digiBASEand digiBASE-E and digiBASE-E digiBASE-E and digiBASE-EdigiBASE ordigiBASE-EdigiDART ordigiDART-LF withDIM-296Included indigiDART-296 andDD-LF-296Included indigiDART-296 andDD-LF-296digiDART-296or DD-LF-296included indigiDART-296 andDD-LF-296NIM solution withincluded in PMT296 ScintiPack PMT 296 NIM amplifier* MCB**BaseBase HVPSNIM solution with276 Preamplifier 276 NIM amplifier* MCB** 556PMT BaseNIM solution with266 PMT Base and113 Preamplifiersimplest system — requirescomputerportable applications withor without computerrequires NIM BIN/PWR andcomputerrequires NIM BIN/PWR andcomputer266 + 113 NIM amplifier* MCB** 556 requires computer*Choice of NIM amplifier: 855, 575, 570A, 590A, 671, 672, 572A.**Choice of MCB: EASY-MCA-2k, EASY-MCA-8k, 919E, 926-M32-USB, 921E, 920E.2

Lanthanum BromideScintillation DetectorsDimensions and WeightsModel Base OD PMT ODLABR-1X1LABR-1.5X1.5LABR-2X2LABR-3X357 mm2.2 in58.7 mm2.3 in58.7 mm2.3 in58.7 mm2.3 in44.5 mm1.8 in58.7 mm2.3 in58.7 mm2.3 in58.7 mm2.3 inDetectorHousing OD30.4 mm1.2 in43.1 mm1.7 in55.8 mm2.2 in82.5 mm3.2 inDetectorHousingLength Overall Length Net Weight26.1 mm1.0 in39 mm1.5 in51.5 mm2.0 in157 mm6.2 in143 mm5.6 in+ pins151.5 mm6.0 in+ pins164 mm6.5 in+ pins194 mm7.6 in+ pinsShippingWeight~.06 lb 5 lb~1 lb 5 lb~1.5 lb 5 lb~2 lb 5 lbOrdering InformationModelDescriptionLABR-1X1 LaBr 3 (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-1.5X1.5LaBr 3 (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-2X2LaBr 3 (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-3X3LaBr 3 (Ce) scintillation detector, 3 x 3-in. crystal with 3-in. diameter 14-pin PMT; resolution 3.5% target.St. Gobain Part No. 2-4-7175.3

Lanthanum BromideScintillation DetectorsORTEC®www.ortec-online.comTel. (865) 482-4411 • Fax (865) 483-0396 • ortec.info@ametek.com801 South Illinois Ave., Oak Ridge, TN 37831-0895 U.S.A.For International Office Locations, Visit Our WebsiteSpecifications subject to change080309