Speaker
Takeyasu Yamagata
(The University of Tokyo)
Description
The Annual discharges and the ratio of 129I/236U from the nuclear reprocessing plants are different, the concentration of 129I, 236U, and the ratio of 129I/236U are novel tracers for the transit time of the Arctic Ocean circulation.
We developed a new 236U-AMS with the time-of-flight detector system at the MALT, The University of Tokyo. To improve sensitivity and decrease background by increasing the extract beam intensity, the sample preparation procedures for the Iron-Uranium co-precipitation ratio and the mixed Nb powder ratio were optimized.
The depth profile of the Chukchi Sea and the Beaufort Sea in the Arctic Ocean during the MR22-06C cruise of R/V Mirai were measured by 236U-AMS at MALT.
| Student Submission | No |
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Primary authors
Takeyasu Yamagata
(The University of Tokyo)
Qiuyu Yang
(The University of Tokyo)
Yuanzhi Qi
(The University of Tokyo)
Miwako Toya
(The University of Tokyo)
Yuichiro Kumamoto
(Japan Agency for Marine-Earth Science and Technology)
Hiroyuki Matsuzaki
(Micro Analysis Laboratory, Tandem accelerator (MALT), The University of Tokyo)
