Ruthenium-106 in the adjacent sea of Japan.
Ruthenium-106 was concentrated from large volume of sea water by co-precipitation with magnesium hydroxide, and then separated from other interfering nuclides by oxidation to Ru(VII) in alkali medium and by solvent extraction of RuO4 to carbontetrachloricle. The analyzed values of radioactivity were increased by oxidation-reduction pretreatment. This increase was discussed using Ru-106 tracer of several chemical forms. The mean value of Ru-106 in the Japan Sea is about three times as large as that in the Kurosio region. The concentration of Ru-106 in surface water increased after the reopening of nuclear explosion tests, reached its maximum in 1963 and decreased exponentially thereafter. The half-lives of Ru-106 and Ce-144 in surface layer were calculated, and are compared each other.
| Main Author: | |
|---|---|
| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
1966
|
| Online Access: | http://hdl.handle.net/1834/16413 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|