NaI cubic detector full-energy peak efficiency, including coincidence and self-absorption corrections for rectangular sources using analytical method

Low activities of radionuclides in environmental and occupational samples demand for the lower detection limits of the measuring system, which can be achieved by minimizing the source-to-detector distance. Analytical technique to calculate full-energy peak efficiency and total efficiency, self-absor...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2021, Vol.327 (1), p.251-258
Main Authors: Abbas, Mahmoud I., Elsafi, Mohamed, Gouda, Mona M., Abd-Elzaher, Mohamed, Hamzawy, A., Badawi, Mohamed S., Thabet, Abouzeid A., Noureddine, Salam, El-Khatib, Ahmed M.
Format: Article
Language:English
Subjects:
Absorption
Analysis
Chemistry
Chemistry and Materials Science
Computational efficiency
Detectors
Diagnostic Radiology
Efficiency
Energy use
Hadrons
Heavy Ions
Inorganic Chemistry
Mathematical analysis
Methods
Nuclear Chemistry
Nuclear Physics
Photons
Physical Chemistry
Radioisotopes
Sensors
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Summary:Low activities of radionuclides in environmental and occupational samples demand for the lower detection limits of the measuring system, which can be achieved by minimizing the source-to-detector distance. Analytical technique to calculate full-energy peak efficiency and total efficiency, self-absorption of sources and a coincidence factor of the NaI cubic scintillation detector with rectangular cavity for rectangular source have been derived. The photon path length of the volumetric sources calculated and determined source self-absorption. The photon attention by rectangular sources and detector cap materials is also calculated. In the experiments gamma aqueous source containing Eu-152 radionuclide covering range from 121 to 1408 keV was used. By comparison analytical method for calculating the full energy peak efficiency and the corrected experimental efficiency values are in good a agreement.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-020-07508-8