Yusuke Sawaki   Miyuki Tahata   Takeshi Ohno   Tsuyoshi Komiya   Takafumi Hirata   Shigenori Maruyama   Jian Han   Degan Shu   
GONDWANA RESEARCH 25(3) 1070-1089 2014年4月 [査読有り]
The Ediacaran-Cambrian was one of the most important periods for the evolution of life. Recent studies have provided detailed chemostratigraphies that decipher the linkages between ambient surface environmental changes and biological evolution. Th...
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 29(2) 347-351 2014年 [査読有り]
A method was developed for the determination of Cs-134/Cs-137 and Cs-135/Cs-137 in rainwater samples using a triple quadrupole ICP-MS, with the objective of investigating radioactive cesium isotope ratios released by the Fukushima Daiichi Nuclear ...
We have developed a new analytical method to determine the mass-dependent isotopic fractionations on Ce and Nd in geochemical samples. Mass discrimination effects on Ce and Nd were externally corrected by normalizing Sm-149/Sm-147 and Eu-153/Eu-15...
Hiroyuki Matsuzaki   Yasuyuki Muramatsu   Takeshi Ohno   Wei Mao   
EPJ Web of Conferences 153 2017年9月
Iodine-131 distribution released from the Fukushima Dai-ichi Nuclear Power Plant accident was reconstructed through the iodine-129 measurements. From nearly 1,000 surface soil samples iodine was extracted by the pyro hydrolysis method. Extracted i...