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Journal Articles

True coincidence summing correction for cylindrical volume samples in $$gamma$$-ray spectrometry

Yamada, Takashi*; Asai, Masato; Yonezawa, Chushiro*; Kakita, Kazutoshi*; Hirai, Shoji*

Radioisotopes, 69(9), p.287 - 297, 2020/09

https://doi.org/10.3769/radioisotopes.69.287

We have confirmed that the commercially available Japanese "standard" gamma-ray analysis programs do not consider the effect of sample volume in calculating true coincidence summing (TCS) corrections, which results in underestimation of $$^{134}$$Cs radioactivity in cylindrical volume samples. In this work, we have developed and examined a practical TCS correction method for general Ge detectors which consider the effect of sample volume properly, and have confirmed that this method can reduce the $$^{134}$$Cs radioactivity underestimation to less than 1%.

Oral presentation

Development of true coincidence summing correction for cascade $$gamma$$-ray emitters including $$^{134}$$Cs, 2; Study of the coincidence summing effect taking into account for the thickness of the cylindrical shaped volume sample

Yamada, Takashi*; Abe, Takaaki*; Asai, Masato; Yonezawa, Chushiro*; Kakita, Kazutoshi*; Hirai, Shoji*

no journal, , 

The true coincidence summing corrections for cascade $$gamma$$ rays are usually carried out by using $$gamma$$-ray detection efficiencies averaged over whole sample volume. This is not an exact method, but is recognized to be practically useful. However, a recent international comparison experiment suggested that this method provides slightly small correction factors. To solve this problem, we developed a method to calculate the true coincidence summing corrections for cylindrical shaped volume samples by dividing the volume sample into a number of plane samples, calculating the efficiencies for each plane sample with summing corrections, and integrating them over whole sample volume. This method improved the problem of small correction factors.

Oral presentation

Development of true coincidence summing correction for cascade $$gamma$$-ray emitters including $$^{134}$$Cs, 1; Collaborative experiment by the committee on preparation of reference materials for radioactivity analysis of JSAC

Yonezawa, Chushiro*; Kakita, Kazutoshi*; Takahashi, Takanori*; Aono, Tatsuo*; Maeda, Satoshi; Abe, Takaaki*; Arakawa, Fumihiro*; Kiho, Nobuharu*; Akiyama, Masakazu*; Muramatsu, Isamu*; et al.

no journal, , 

no abstracts in English

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