Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Riki Seki"'
Autor:
Tetsuji Imanaka, Satoru Endo, Kenichi Tanaka, Eckehart Nolte, Kimikazu Sasa, Kazuhisa Komura, Riki Seki, Hiroshi Fukushima, Masaharu Hoshi, Masayori Ishikawa, Thomas Huber, T. Straume, Keisuke Sueki, Werner Rühm, S. D. Egbert, Yasuo Nagashima
Publikováno v:
Radiation and Environmental Biophysics. 47:313-322
In the process of developing a new dosimetry system for atomic bomb survivors in Hiroshima and Nagasaki (DS02), an intercomparison study between (152)Eu and (36)Cl measurements was proposed, to reconcile the discrepancy previously observed in the Hir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc49810c2ca3035a0004729ce41546c1
https://doi.org/10.1007/s00411-008-0166-z
https://doi.org/10.1007/s00411-008-0166-z
Autor:
Yuki Tosaki, Taichi Miura, Hiroshi Matsumura, Ming He, Yasuo Nagashima, Kimikazu Sasa, Keisuke Sueki, Kotaro Bessho, Tsutomu Takahashi, Riki Seki
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 259:41-46
With the current AMS system on the 12UD Pelletron tandem accelerator at the University of Tsukuba, we are able to measure the long-lived radioisotopes of 14 C, 26 Al, 36 Cl and 129 I by employing a molecular pilot beam method that stabilizes the term
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::991251a35029bf715157080342f13fa2
https://doi.org/10.1016/j.nimb.2007.01.313
https://doi.org/10.1016/j.nimb.2007.01.313
Autor:
Taichi Miura, Kimikazu Sasa, Tsutomu Takahashi, Hiroshi Matsumura, Ming He, Kotaro Bessho, Gudrun Massmann, Yuki Tosaki, Norio Tase, Riki Seki, Keisuke Sueki, Takeshi Matsuhiro, Yasuo Nagashima
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 259:479-485
The 36 Cl/Cl ratios of groundwater samples were measured by accelerator mass spectrometry (AMS) in order to investigate the potential use of 36 Cl as a dating tool for modern groundwater. Groundwater samples were obtained from several piezometers in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb3a2b96bf5b0ea2ad833c78b08acfdf
https://doi.org/10.1016/j.nimb.2007.02.096
https://doi.org/10.1016/j.nimb.2007.02.096
Autor:
Hiroshi Matsumura, Kimikazu Sasa, Riki Seki, Kotaro Bessho, Taichi Miura, Yuki Tosaki, Takeshi Matsuhiro, Yasuo Nagashima, Tsutomu Takahashi
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 259:241-245
An 129I-AMS system has been developed on the 12UD tandem accelerator at the Tandem Accelerator Complex, University of Tsukuba using a 97Mo16O2 molecular pilot beam method developed at the complex. The acceleration voltage of the tandem is precisely c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45e517e83266db9c268828e4837e1996
https://doi.org/10.1016/j.nimb.2007.01.163
https://doi.org/10.1016/j.nimb.2007.01.163
Autor:
Kimikazu Sasa, Tsutomu Takahashi, Yuki Tosaki, Takeshi Matsuhiro, Riki Seki, Kotaro Bessho, Keisuke Sueki, Yasuo Nagashima, Hiroshi Matsumura, Taichi Miura
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 259:486-490
We have measured the 36Cl/Cl ratio of uncultivated surface soil samples collected from 11 areas distributed throughout Japan to determine the undisturbed value of the ratio. The ratio was found to be on the order of 10−13 except for the Tokai-mura
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00fab0d295c99a75b36a71dab1342f4f
https://doi.org/10.1016/j.nimb.2007.01.227
https://doi.org/10.1016/j.nimb.2007.01.227
Autor:
H. Hagura, Keisuke Sueki, Tsutomu Takahashi, Riki Seki, Yasuo Nagashima, K. Masumoto, Hiroshi Matsumura, Kotaro Bessho, Yuki Tosaki, Takeshi Matsuhiro, Qiugui Wang, Taichi Miura, Kimikazu Sasa
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 259:702-707
The thermal neutron fluence that poured into the shielding concrete of proton accelerator facilities was estimated from the in situ production of 36Cl. The thermal neutron fluences at concrete surfaces during 10–30 years of operation were in the ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b6714a3ca86f68ec4c74dbc9998f8c7
https://doi.org/10.1016/j.nimb.2007.01.208
https://doi.org/10.1016/j.nimb.2007.01.208
Publikováno v:
Shinku. 50:475-479
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::691ef5042d2a158e77a68c0011c012ff
https://doi.org/10.3131/jvsj.50.475
https://doi.org/10.3131/jvsj.50.475
Autor:
Taichi Miura, Qingbin Wang, Yasuo Nagashima, Riki Seki, Kimikazu Sasa, Kotaro Bessho, Kazuyoshi Masumoto, Hiroshi Matsumura, Tsutomu Takahashi, Keisuke Sueki, Takeshi Matsuhiro
Publikováno v:
Radiochimica Acta. 94:801-805
Accelerator mass spectrometry (AMS) was applied to the analysis of 36Cl induced in concrete samples obtained from accelerator facilities. In order to use a small amount of concrete sample and to separate chlorine as pure as possible, an improvement o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a40b11d515ea9e7e676daaba6e16323a
https://doi.org/10.1524/ract.2006.94.12.801
https://doi.org/10.1524/ract.2006.94.12.801
Autor:
Kimikazu Sasa, Keisuke Sueki, Riki Seki, Takeshi Matsuhiro, Ming He, Kexin Liu, Shaoyong Wu, Shan Jiang, Tsutomu Takahashi, Xiaotang Ren, Yaoyun Yang, Kejun Dong, H. Tosaki, Yasuo Nagashima
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 240:612-616
The mystery of 26Al origin has made the nuclide important in the astrophysics. It was proposed that the reaction, 14N(16O,α)26Al, may be one of the origin of the source of 26Al in the cosmic. In his work, the 26Al was measured with AMS by using full
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a2edbc3ecd04117f41d17445dbe5673
https://doi.org/10.1016/j.nimb.2005.04.132
https://doi.org/10.1016/j.nimb.2005.04.132
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 263:393-398
The recent developments of extraction chromatography and ICP-MS made easier the determination of 99Tc in environmental samples. However, in the non-contaminated area, a pre-concentration procedure is necessary, because usually a large amount of sampl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c54038f274c092b4f623edb0fbcf853e
https://doi.org/10.1007/s10967-005-0068-3
https://doi.org/10.1007/s10967-005-0068-3