Real-Time Radionuclide Identificaton

D. Brown, G. Mattesich

Berkeley Nucleonics Corporation (BNC) has developed the portable Model 935 SAM that will detect, identify, and quantify mixed isotopes in real time. A new concept in spectroscopy utilizes a NaI detector and a patented process to accurately identify mixed isotopes from a large library of over 90 isotopes. A technique called hysteresis and a quadratic compression algorithm identifies isotopes within 1 second and then processes the data for an additional second to confirm identification. High confidence levels of over 97% are achieved even when weak sources are below background levels of intensity. Sensitive nuclear materials (SNM), medical, and industrial isotopes are identified even in the presence of high background. Time slice technology coupled with background subtraction will quickly identify contraband moving through a checkpoint, even when masking is attempted by another isotope. The Model 935 SAM was developed so that technical users, as well as non-technical users, would find it extremely easy to operate. The display presentation is also easy to interpret. Calibration is automatic and performed by pressing one of the four soft keys. Upon power-up the instrument will automatically indicate the identified isotopes, its category, and dose rate. The display shows the isotopic breakdown of dose rate, total dose rate, and total accumulated dose. A soft key pressed by an experienced technical user or health physicist will allow all the sophistication of an MCA with quantitative analysis. This area of operation can be password protected if desired. All users will find that the SAM will meet many demanding tasks in applications such as environmental waste monitoring, remediation, safeguards and emergency response.

We have added some exciting new options to the hand-held Model 935 SAM - Surveillance and Measurement System. An integral He3 neutron detector is useful in power plants and for identifying shielded SNM. A portable printer can be connected directly to the SAM for printing the MCA report. In addition we offer a powerful analysis program for the PC to achieve accurate and advanced quantitative analysis.