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Measurement test of non-destructive assay for quantification of nuclear materials in fuel debris, 5; In-situ passive gamma-ray measurement for plutonium item using a CeBr$$_3$$ detector

Kaburagi, Masaaki   ; Shiba, Tomooki  ; Okumura, Keisuke ; Nauchi, Yasushi*; Suzuki, Risa; Nomi, Takayoshi ; Nagatani, Taketeru ; Takada, Akira*; Kosuge, Yoshihiro*

The passive gamma-ray spectroscopy for plutonium nuclear fuels was performed using a small volume CeBr$$_{3}$$ detector specific to high dose-rate measurements. This presentation reports that the wide energy range of gamma-ray spectra was obtained by the spectroscopy, and the energy range covered the principal gamma-decay lines of 59.5 keV emitted from $$^{241}$$Am and 2615 keV emitted from $$^{208}$$Tl, which is a descendant nuclide of $$^{236}$$Pu, comparing the measurements using HPGe.

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