Standardizing by photon-photon coincidence technique to produce electron capture disintegrates radioactive sources
DOI:
https://doi.org/10.34117/bjdv9n5-263Keywords:
coincidence technique, metrology, radioactive sourcesAbstract
The system using X-gamma coincidence technique for the standardizing radionuclide, which present simple and complex decay scheme with X-rays of energy below 100 keV has deployed by Radionuclide Laboratory (LNMRI), Brazil. The work was carried using a sodium iodide detector, for gamma photons, in combination with a high purity germanium detector for X-rays. Samples of 65Zn and 133Ba were standardized and the results for both radionuclides showed good precision and accuracy when compared with reference values. The standardization differences were 0.72 % for 65Zn and 0.48 % for 133Ba samples.
References
Barnothy J and Forro M 1951 Coincidence Methods of Measuring Disintegration Rates of Radioactive Sources The Review of Scientific Instruments 22 415.
Campion PJ 1959 The standardization of radioisotopes by beta-gamma coincidence method using high efficiency detectors, Int. J. Applied Radiation and Isotopes 4 232.
Baerg A P 1973 The Efficiency Extrapolation Method in coincidence counting, Nuclear Instruments and Methods II2 143.
Iwahara A 1979 Técnica de traçador para medida específica de 63Ni, utilizando um sistema de coincidência 4 Tese de Mestrado Instituto Militar de Engenharia Brasil.
Bryant J 1962 Anticoincidence counting method for standardizing radioactive materials. Applied Radiation and Isotopes 13 273.
Bryant J 1996 Advantage of anticoincidence counting for standardization of radionuclides emitting delayed gamma IEEE Symp. Standardization of Radionuclides SM 79 21.
Baerg AP, MUNZENMAYER K and BOWES GC 1976 Live-Timed Anticoincidence Counting with Dead Time Circuitry Metrologia 12 77.
Brinkman GA, Aten Jr. AHW 1963 Absolute standardization with a NaI(Tl) crystal III. Int. J. Applied Radiation and Isotopes 4 503.
da Silva, RL, de Almeida MCM, Delgado JU, Poledna R, Veras AS, Rangel J, Trindade OL 2016 Metrological activity determination of 133Ba by sum-peak absolute method 8th Brazilian Congress on Metrology IOP Journal of Physics: Conferences Series 733/012095 doi:10.1088/1742-6596/733/1/012095.
Iwahara A, Marechal MH, da Silva CJ and Poledna R 1990 Determination of the activity concentration of a 125I solutions by X-(X,) coincidence counting and efficiency extrapolation curve Nuclear Instruments and Methods A 286 370.
Schrader H 2006 Photon-photon coincidences for activity determination: I-125 and other radionuclides Applied Radiation and Isotopes 64 1179.
de Almeida M.C.M., Delgado J.U., Silva R. L. , Poledna, R. 2022 Gamma Spectrometry results for the 134Cs nuclear parameters . Brazilian Journal of Development 8 (5) 34424.
Braga B. M. , Rocha A. S. 2023 Radioactivity: experiencing a didactic seguence in a social preparatory course to getting to universities in the city of Rio de Janeiro. Brazilian Journal od Development 9 (4) 13002.
Baerg AP 1966 Measurement of Radioactive Disintegration Rate by Coincidence Method Metrologia 2 166 23.
Kawada Y 1972 Extended Applications and Improvement of the coincidence Method in Standardization of Radionuclides ETL report 730.
Grigoresku L 1973 Accuracy of coincidence measurements Nuclear Instruments and Methods
151.

