Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Isotope identification"”.
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Bayesian algorithms for automated isotope identification
Handheld radio-isotope identifiers (RIIDs) are widely used in the United States for nuclear security, but these detectors generally have poor performance in isotope identification. While much research is being conducted on alternative detector materials, there is much evidence that the primary …
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Automated isotope identification algorithm using artificial neural networks
… the relative activities of a mixture of many isotopes in a low-resolution gamma-ray spectrum. While techniques for this task exist, they require a human operator and are too slow to use on very large datasets of spectra. Pattern recognition algorithms such as neural networks are prime …
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Automated isotope identification algorithms for low-resolution gamma spectrometers
Handheld radio-isotope identifiers (RIIDs) are widely deployed for nuclear security applications, but these detectors generally have poor isotope identification performance. Most of these deployed detectors use low-resolution NaI scintillators due to their low cost and good efficiency. Alternative …
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Automated isotope identification and quantification using artificial neural networks
Current radioisotope identification devices struggle to identify and quantify isotopes in low-resolution gamma-ray spectra in a wide range of realistic conditions. Trained gamma-ray spectroscopists typically rely on intuition when identifying isotopes in spectra. A trained gamma-ray spectroscopist …
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Plastic scintillation spectrometry
… with Symetrica's spectral deconvolution and isotope identification software, PVT detectors were given isotope identification ability. Far from being simple gamma-ray counters, these detectors were used to successfully identify a range of complex isotopes, such as Eu-152, Ra-226 and Th-232. …
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Automated wavelet analysis of low resolution gamma-ray spectra and peak area uncertainty
The accuracy of automated isotope identification from low resolution gamma-ray spectra can be significantly improved with better algorithms. The method based on the wavelet transform and non-negative least squares (NNLS) are discussed in this thesis. Several improvements are made for the wavelet …
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Implementation and simulation of mobile sensor networks for nuclear radiation detection
… Anomaly detection, source localization, and isotope identification are three major parts of radiation detection. The concept of mobile radiation sensor networks, which utilize multiple mobile radiation detectors, has been proposed to solve these problems. This work mainly focuses on …