| Co-Investigator(Kenkyū-buntansha) |
塚田 和明 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 研究主席 (30343916)
佐藤 哲也 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 研究副主幹 (40370382)
Chiera Nadine 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 博士研究員 (00807498)
豊嶋 厚史 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 先端基礎研究センター, 研究副主幹 (40414578)
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| Budget Amount *help |
¥40,950,000 (Direct Cost: ¥31,500,000、Indirect Cost: ¥9,450,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2017: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2016: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
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| Outline of Final Research Achievements |
We have developed a high intensity ion beam extraction technique using a surface ionization source and succeeded in measuring the first ionization energies of heavy actinide elements. The adsorption behavior of the lawrencium (Lr) atom on a metallic Ta surface was also investigated by modifying a cylindrical metal ion source as a chromatographic column. Interesting results were obtained that the adsorption mainly involves electrons different from the valence electrons in the ground state. The volatile compound of dubnium (Db) was successfully synthesized and chemically separated, and the volatile species was determined. The influence of relativistic effects on the formation of the Db compound was also suggested. A high-temperature nozzle-type and an electron recombination-type atomic beam generator were constructed and both them successfully extracted an atomic beam. However, it was found that further improvement is needed for the application to superheavy elements.
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