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31.
Saito-Kokubu Y Yasuda K Magara M Miyamoto Y Sakurai S Usuda S Yamazaki H Yoshikawa S Nagaoka S Mitamura M Inoue J Murakami A 《Journal of environmental radioactivity》2008,99(1):211-217
In a sediment core of Nishiyama reservoir at Nagasaki city, depth profiles of (240)Pu/(239)Pu isotopic ratio, (239+240)Pu and (137)Cs activities were determined. Sediments containing plutonium and (137)Cs, which were deposited immediately after a detonation of Nagasaki atomic bomb, were identified in the core. Observed below the sediments were macroscopic charcoals, providing evidence for initial deposit of the fallout of the Nagasaki atomic bomb. This is the first entire depositional records of plutonium and (137)Cs released from the Nagasaki atomic bomb together with those from atmospheric nuclear tests. 相似文献
32.
Sanjou Michio Kato Kyohei Aizawa Wataru Okamoto Takaaki 《Environmental Fluid Mechanics》2022,22(4):955-969
Environmental Fluid Mechanics - The present study develops a safety survey system for measuring natural river discharge. Monitoring of rivers is very important for river environment conservation... 相似文献