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SAM 940 Revealer


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  • One Hand Operation
  • Auto Calibration / Stabilization with NORM
  • Accuracy In High Background
  • Homeland Security
  • Baggage & Cargo Screening
  • Field Confirmation of Pager Alarms
  • Customs & Border Protection
  • DHS / DNDO Reachback Support (ANSI)
  • GPS Enabled Plume or Land Modeling
  • GPS Enabled Perimeter Setup
  • Fixed (Semi-Permanent) Monitoring w/ ID
Confidence factors when identifying radioactive materials are critical to a successful mission. To give your end users an edge over traditional identification methods, the latest in MCA and algorithm technology has been coupled with a new detector material for gamma ray collection. The SAM Revealer comes standard with a 1.5” x 1.5” lanthanum bromide detector (LaBr ) and the QCC™ statistical enhancement transform which provides background subtraction in real time and therefore the highest degree of sensitivity. The SAM is designed to operate in any background (high or low), including Bremsstrahlung or Compton, with the interference subtracted in real time (one second or less). With this advanced identifier, your spectroscopic data collection, isotope identification and data analysis reporting are all automated with exceptional resolution. This large improvement in resolution also allows quick identification of mixed radionuclides, a typical problem with the overlapping peaks of lower resolution sodium.

Peak Resolution

One critical specification for gamma ray detectors is peak resolution. In nuclear spectroscopy, we often express the resolution as a percentage at 662 keV (cesium). For the SAM Revealer, the typical resolution is 2.8%. This is about 2.5 times better than sodium iodide detectors and therefore allows separation of many closely spaced peaks.

The Lanthanum Bromide Advantage

Because your applications for isotope identification vary, and user skill level varies, we offer several modes of operation. Training requirements are reduced by the handy user interface and color-coded isotope categories. A SAM Revealer Easy- Mode simplifies screening and identification activities. In cases where you are identifying special nuclear material or masked isotopes, enhanced peak separation as found in the SAM Revealer will be helpful in giving you high confidence reporting. For example, separating the conflicting and overlapping lines of multiple sources such as Cs137 and Th232, Cs137 and Ra226 or Co60 and Ra226, is challenging with low resolution detectors (6% or greater). Advanced algorithms can compensate for some of the shortfall, but high resolution from a LaBr detector identification with a high degree of confidence. One of the best advantages of LaBr is clearly seeing the gamma and x- ray peaks of plutonium. The one highly penetrating NaI peak of Pu239 is now clearly seperated into three easily recognized peaks with LaBr . The first line responder can easily email the SAM Revealer data report (complete with GPS data, ANSI N42.42 compliant) to the appropriate scientific support center for further analysis. These enhanced spectra will be of great value to those responsible for evaluating and responding to critical situations.

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