| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
As a low-dose high-sensitivity trace element analytical method for precious cultural heritage samples, we constructed and tested an X-ray fluorescence spectrometry system which uses quasi-monochromatic X-rays generated by irradiating a metal target with a proton beam as an excitation source. Cu-containing standard samples simulating Japanese paintings were measured and the detection limit for Cu was evaluated. As a result, it was found that by matching the energy of the primary X-ray to the absorption edge of the element to be measured, the dose to obtain the same detection limit performance as compared to conventional XRF can be significantly reduced. A simulated sample containing a mixture of Cu- and Co-based pigments was also measured, and we found that Co could be selectively measured with high accuracy and low dose using a Cu target.
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