Title :
Improved quantitative gamma-ray spectroscopy using a standard 3 inch NaI detector
Author :
Meng, L.J. ; Ramsden, D.
Author_Institution :
Dept. of Phys. & Astron., Southampton Univ., UK
Abstract :
Recent developments in the application of maximum likelihood expectation maximisation (MLEM) techniques to the deconvolution of low-resolution gamma-ray spectra have demonstrated a substantial improvement in both the energy-resolution and sensitivity achievable with the industry-standard 3" NaI scintillation counter. This technique can be used to determine the specific activities of the radioisotopes present in low-activity materials. In this paper, a practical application of this method for measuring the cement content of concrete in real-time is presented. However, the technique can be applied in many other fields
Keywords :
cements (building materials); concrete; deconvolution; gamma-ray detection; gamma-ray spectroscopy; maximum likelihood estimation; solid scintillation detectors; 3 inch; NaI; NaI detector; cement content; concrete; deconvolution; energy-resolution; improved quantitative gamma-ray spectroscopy; low-activity materials; low-resolution gamma-ray spectra; maximum likelihood expectation maximisation; radioisotopes; scintillation counter; sensitivity; specific activities; Aggregates; Astronomy; Concrete; Energy measurement; Energy resolution; Extraterrestrial measurements; Gamma ray detection; Gamma ray detectors; Physics; Spectroscopy;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949206
