Handheld Radioisotope Identifier

A Radiation Isotope Identifier device (RIIDs) Radiation Detector is a detector that conducts real-time gamma-ray spectroscopic analysis to monitor and distinguish between different radioactive isotopes. The principle of a radioactive isotope device (RIID) is to distinguish the gamma radiations with characteristic energies from different radioisotopes. This is how a scintillator-based radioactive isotope device works: the gamma radiations hit the scintillation detectors, and the scintillators emit light pulses, which are converted into digital signals, which are further processed and plotted into the form of a gamma spectrum in the upper end. The gamma spectrum typically reveals peaks at specific energies. The software integrated in the radioisotope identifier then compares the observed spectrum peaks and their ratios to a database of known radionuclide isotopes.

Hangzhou Shalom EO provides Handheld Radioactive Isotope Identification Device (RIID) Radiation Detector, The RIID radiation detector is an integrated gamma detector/spectrometer containing NaI(Tl) or LaBr3(Ce) scintillator detectors for γ-ray dose rate measurement, radioactive source search and rapid radioactive isotope identification, leveraging the cutting-edge gamma spectroscopic technologies. Compared with RIID based on semiconductors like HPGe or CZT, RIID using scintillator detectors is much more cost-effective. The power can either be supplied with an in-unit lithium battery or via external alternative current power sources. The handheld RIID radiation detector has a compact and lightweight construction, allowing convenient and burdenless radionuclide monitoring with long continuous working time. The rugged housing and waterproof IP65 sealing are suitable for various working conditions. 

The radioactive isotope identifier based on gamma spectrometer technologies exploits a novel nuclear spectrum measurement processing architecture to strengthen the measuring and analyzing abilities and for better recognising of nuclides, providing users with an approach to efficiently locate abnormal radioactivities and differenciate radionuclides with high accuracies. Our handheld radioisotope identifier can be used for the identification of special nuclear materials (SNM), medical Isotopes (MED), industrial isotopes (IND), and naturally occurring radioactive material (NORM), etc. The spectroscopic results can be compliant with the ANSI standards. From nuclear industries, nuclear power plants, homeland security, border inspection, Centers for Disease Control and Prevention (CDC), and scientific research labs, our handheld radioactive isotope identifiers are superior for multiple applications with their versatile functions and rugged construction.

Shalom EO’s handheld RIID radiation detector provides high-resolution isotope identification based on NaI(Tl) or LaBr3(Ce) scintillation detectors integrated with silicon photomultiplier (SiPM). Our RIID radiation detector also contains GM tubes for detection and alarm at high dose rates. 

An important parameter for RIID radiation detectors is energy resolution, which is how fine the detector can differentiate between two close energy peaks. The traditional radioisotope identifiers often use the intrinsic resolution of the detector to characterise the isotope resolution capabilities. However, the actual energy resolutions of radioactive isotope identification devices are, in truth, not simply equivalent to the inherent energy resolution of the scintillation detector but also dependent upon other factors, including signal processing methods and energy spectrum analysis techniques. Shalom EO’s handheld RIID gamma radiation detector utilizes advanced digital filtering algorithms to process signals, reducing noises, improving the effective energy resolutions and the abilities to resolve overlapping peaks, thus accquring efficient and precise radionuclide identification. The energy resolution of NaI(Tl) can be enhanced from 7.5% to around 6%, and the energy resolution of LaBr3(Ce) from 3.5% to around 2%.  

Sometimes, the radioactive sources can be shielded so that the gamma radiation amount reaching the detector falls below the detection limits of the device or the energy spectrum is incorrectly altered. The improved capabilities make our radionuclide identifier excellent for such challenging situations as detecting concealed or shielded special nuclear materials (SNM) or identification where multiple isotopes are present in the same spectrum. 

The identification software with a pre-programmed library of radioactive isotopes allows quick and accurate identification of 4 categories and 16 radioactive isotopes, and the library can be further edited and customized to meet your needs, while detection of unknown nuclides can be alarmed as audio or visual alarms. The device can measure a broad range of radiation intensities, from background levels to very high doses, up to 1 Sievert per hour (Sv/h). Our handheld gamma detector for radioisotope identification highlights automatic energy calibration and real-time adaptive spectrum stabilization, making our handheld RIID gamma spectrometer stable and reliable under temperature changes and over long-time operations. The RIID radiation detector also has a data uploading function; a large amount of real-time data can be stored and uploaded via a host software, as automatically compiled into reports.