TY - GEN
T1 - Automated photopeak detection and analysis in low resolution gamma-ray spectra for isotope identification
AU - Sullivan, C. J.
AU - Lu, J.
PY - 2013
Y1 - 2013
N2 - Automated isotope identification has long been an important problem in homeland security and nuclear emergency response. This process is difficult for low-resolution spectra because peaks can be significantly overlapping. Also, their areas can be difficult to determine because of the fluctuating baseline due to the Compton continuum across the whole spectrum. The wavelet transform stands out among many potential solutions of this problem, owing to its ability to de-noise noisy signals, pattern matching, and simultaneous multi-resolution signal analysis. In this paper, a novel wavelet-based algorithm for detecting peaks and measuring their areas is introduced, and specific wavelets are selected to find the optimal scale of signal analysis. Their abilities in locating peaks, resolving overlapping peaks, and determining peak areas are presented and assessed with both simulated signals and real gamma-ray spectra.
AB - Automated isotope identification has long been an important problem in homeland security and nuclear emergency response. This process is difficult for low-resolution spectra because peaks can be significantly overlapping. Also, their areas can be difficult to determine because of the fluctuating baseline due to the Compton continuum across the whole spectrum. The wavelet transform stands out among many potential solutions of this problem, owing to its ability to de-noise noisy signals, pattern matching, and simultaneous multi-resolution signal analysis. In this paper, a novel wavelet-based algorithm for detecting peaks and measuring their areas is introduced, and specific wavelets are selected to find the optimal scale of signal analysis. Their abilities in locating peaks, resolving overlapping peaks, and determining peak areas are presented and assessed with both simulated signals and real gamma-ray spectra.
UR - http://www.scopus.com/inward/record.url?scp=84904155090&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84904155090&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2013.6829437
DO - 10.1109/NSSMIC.2013.6829437
M3 - Conference contribution
AN - SCOPUS:84904155090
SN - 9781479905348
T3 - IEEE Nuclear Science Symposium Conference Record
BT - 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013
Y2 - 27 October 2013 through 2 November 2013
ER -