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Report No.
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Development of software to support the efficiency of mass spectrometric imaging

Yanagisawa, Kayo; Yokota, Hiromi; Matsueda, Makoto   ; Ishiniwa, Hiroko*; Fujimoto, Katsushige*; Takagai, Yoshitaka*

Fuel debris is considered a heterogeneous mixture of nuclear fuel, control rods and reactor structural materials that has cooled and solidified, and it is important to understand its composition (elements and isotopes) and distribution to formulate storage, treatment and disposal methods after fuel debris removal. Mass spectrometric imaging using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is useful for the aforementioned fuel debris analysis because it can visualise the distribution of elements and isotopes at the 10$$^{-4}$$ - 10$$^{-1}$$ $$mu$$g/g level with a spatial resolution of 10-100 $$mu$$m. However, the number of data is enormous when the number of measurement points is large. In this study, an automatic peak detection method using the asymmetric least squares method with a penalty term was developed, data processing for LA-ICP-MS was automated and an intuitive GUI was constructed.

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