| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Francium (Fr) is the heaviest alkali metal with the atomic number 87. It is one of the least-studied elements among the naturally occurring elements because all its isotopes are short-lived. The purpose of this research is to clarify complex formation properties of the heaviest alkali metal, francium (Fr). The relatively long-lived isotope 212Fr (T1/2 = 20 min) was produced in the heavy ion nuclear fusion reaction using the RIKEN AVF cyclotron. In this work, excitation functions for the 206/207/208Pb(11B,x)212Fr reactions were successfully measured for the first time. Distribution ratios of Fr ion in solvent extraction with seven kinds of crown ethers were measured. The results were compared with those of lighter alkali metal ions.
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