Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 28

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Circulation in the northern Japan Sea studied chiefly with radiocarbon

Aramaki, Takafumi*; Senju, Tomoharu*; Togawa, Orihiko; Otosaka, Shigeyoshi; Suzuki, Takashi; Kitamura, Toshikatsu; Amano, Hikaru; Volkov, Y. N.*

Radiocarbon, 49(2), p.915 - 924, 2007/10

 Times Cited Count:8 Percentile:26.24(Geochemistry & Geophysics)

no abstracts in English

Journal Articles

Determination of $$^{129}$$I in environmental samples by AMS and NAA using an anion exchange resin disk

Suzuki, Takashi; Bamba, Shigeru*; Kitamura, Toshikatsu; Kabuto, Shoji*; Isogai, Keisuke*; Amano, Hikaru

Nuclear Instruments and Methods in Physics Research B, 259(1), p.370 - 373, 2007/06

 Times Cited Count:12 Percentile:66.47(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Status and progress of JAEA-MUTSU Tandetron AMS

Amano, Hikaru; Kabuto, Shoji; Kinoshita, Naoki; Suzuki, Takashi; Tanaka, Takayuki; Otosaka, Shigeyoshi; Kuwabara, Jun; Kitada, Yoshinobu*; Watanabe, Yukiya*; Kitamura, Toshikatsu

Dai-19-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.1 - 4, 2007/01

no abstracts in English

Journal Articles

High sensitivity measurement of Iodine-129/Iodine-127 ratio by accelerator mass spectrometry

Suzuki, Takashi; Kitamura, Toshikatsu; Kabuto, Shoji*; Togawa, Orihiko; Amano, Hikaru

Journal of Nuclear Science and Technology, 43(11), p.1431 - 1435, 2006/11

 Times Cited Count:12 Percentile:65.95(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Performance of iodine beam line for accelerator mass spectrometry

Suzuki, Takashi; Kitamura, Toshikatsu; Kabuto, Shoji; Togawa, Orihiko; Kinoshita, Naoki; Amano, Hikaru

JAEA-Technology 2006-018, 40 Pages, 2006/03

JAEA-Technology-2006-018.pdf:4.33MB

An accelerator mass spectrometry has been set up at the Mutsu Establishment of Japan Atomic Energy Agency. This AMS has two independent beam lines, optimized for $$^{14}$$C and $$^{129}$$I measurements. For the $$^{129}$$I measurement, precision and reproducibility was 2.0 - 1.5% and 1.5 - 0.7%, respectively at the acceptance test in July 2000, and after that, exchange of MCP and re-alignment improved precision and reproducibility to 0.6% and 0.26%, respectively. The results of testing standard materials, which have a variety of iodine isotopic ratios ($$^{129}$$I/$$^{127}$$I), showed that this beam line has excellent measurement accuracy between 10$$^{-10}$$ and 10$$^{-12}$$ iodine isotopic ratios, and the detection limit is substantially below the 10$$^{-13}$$ iodine isotopic ratio. Sub-standard samples were normalized to NIST SRM 3230 standard reference material, and the iodine isotopic ratio was (1.21$$pm$$0.01)$$times$$10$$^{-10}$$ for Iso Trace Lab. Standard, (7.22$$pm$$0.03)$$times$$10$$^{-11}$$ for Standard No. 3K and (2.77$$pm$$0.03)$$times$$10$$^{-11}$$ for Standard No. 3i.

Journal Articles

Status and future plan of JAEA Mutsu tandetron AMS facilities

Amano, Hikaru; Kabuto, Shoji; Kinoshita, Naoki; Suzuki, Takashi; Kitamura, Toshikatsu

UTTAC-74, p.77 - 81, 2006/00

no abstracts in English

Journal Articles

Status on tandetron AMS in JAERI-Mutsu

Kitamura, Toshikatsu; Kabuto, Shoji*; Suzuki, Takashi; Amano, Hikaru; Kitada, Yoshinobu*; Watanabe, Yukiya*

Dai-17-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.52 - 55, 2004/12

no abstracts in English

Journal Articles

Establishement for the measurement of $$^{129}$$I by accelerator mass spectormetry

Suzuki, Takashi; Kitamura, Toshikatsu; Kabuto, Shoji*; Togawa, Orihiko; Amano, Hikaru

Dai-46-Kai Kankyo Hoshano Chosa Kenkyu Seika Rombun Shorokushu (Heisei-15-Nendo), p.109 - 110, 2004/12

no abstracts in English

Journal Articles

AMS measurement of $$^{129}$$I and its application as an oceanographic tracer

Suzuki, Takashi; Kitamura, Toshikatsu; Kabuto, Shoji*; Togawa, Orihiko; Amano, Hikaru

IAEA-CN-118/84P, p.529 - 530, 2004/10

no abstracts in English

Journal Articles

Performance of the new iodine-129 beamline at JAERI-AMS

Suzuki, Takashi; Aramaki, Takafumi; Kitamura, Toshikatsu; Togawa, Orihiko

Nuclear Instruments and Methods in Physics Research B, 223-224(1-4), p.87 - 91, 2004/08

 Times Cited Count:13 Percentile:66.18(Instruments & Instrumentation)

At the Japan Atomic Energy Research Institute, an Accelerator Mass Spectrometer which was installed in Mutsu establishment has two independent beam lines. We verified the precision, the accuracy and the detection limit at this AMS iodine line. Acceptance test for $$^{129}$$I measurement was carried out on two consecutive days and the $$^{129}$$I/$$^{127}$$I ratios obtained during these two days were (7.497$$pm$$0.119) $$times$$10 $$^{-11}$$ and (7.209$$pm$$0.050) $$times$$10 $$^{-11}$$ , respectively and the relative standard deviations from the $$^{129}$$I/$$^{127}$$I averages per sample were 1.6 % and 0.7 %, respectively. Seawater samples were collected in the western North Pacific and off Rokkasho, Japan before the operation of a nuclear fuel reprocessing plant. Seawater samples preparation for $$^{129}$$I -AMS measurement was performed by an extraction method. This paper was summarized the performance of this AMS iodine line and measurement results of $$^{129}$$I/$$^{127}$$I ratio in seawater samples.

Journal Articles

Distribution of radiocarbon in the Sea of Japan (prompt report)

Aramaki, Takafumi*; Togawa, Orihiko; Kitamura, Toshikatsu

Dai-16-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.170 - 172, 2004/02

no abstracts in English

Journal Articles

Status on Tandetron AMS in JAERI-Mutsu

Kitamura, Toshikatsu; Kabuto, Shoji*; Suzuki, Takashi; Togawa, Orihiko; Kitada, Yoshinobu*; Watanabe, Yukiya*

Dai-16-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.27 - 31, 2004/02

no abstracts in English

Journal Articles

Performance of iodine line at JAERI-AMS

Suzuki, Takashi; Aramaki, Takafumi*; Kitamura, Toshikatsu; Togawa, Orihiko

Dai-16-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.162 - 165, 2004/02

no abstracts in English

Journal Articles

Measurement of iodine-129 by JAERI-AMS and its application to oceanography

Suzuki, Takashi; Kitamura, Toshikatsu; Togawa, Orihiko; Amano, Hikaru

UTNST-SMP-12, p.116 - 121, 2003/12

no abstracts in English

Journal Articles

Anthropogenic radionuclides in the Japan Sea; Their distributions and transport processes

Ito, Toshimichi; Aramaki, Takafumi; Kitamura, Toshikatsu; Otosaka, Shigeyoshi; Suzuki, Takashi; Togawa, Orihiko; Kobayashi, Takuya; Senju, Tomoharu*; Chaykovskaya, E. L.*; Karasev, E. V.*; et al.

Journal of Environmental Radioactivity, 68(3), p.249 - 267, 2003/07

 Times Cited Count:35 Percentile:61.29(Environmental Sciences)

The anthropogenic radionuclides, $$^{90}$$Sr, $$^{137}$$Cs and $$^{239+240}$$Pu, in the seawater column of the Japan Sea were measured during 1997-2000. The vertical profiles of radionuclide concentrations showed their typical features; exponential decrease with depth for the $$^{90}$$Sr and $$^{137}$$Cs and surface minimum - subsurface maximum for the $$^{239+240}$$Pu, and there are no substantial differences between the present study and the previous ones. The area-averaged concentrations and the inventories of radionuclides in the Japan Sea are higher than those in the Northwest Pacific Ocean. In the spatial distributions, high inventory area extends and intrudes from the Japan Basin into the Yamato Basin. It is suggested that radionuclides sink by the vertical transport occurring mainly in the Japan Basin then advect into the Yamato Basin after detouring around the Yamato Rise, and finally, they are accumulated in the deep seawater of the Japan Sea.

Journal Articles

Status on tandetron AMS in JAERI Mutsu

Kitamura, Toshikatsu; Togawa, Orihiko; Aramaki, Takafumi; Suzuki, Takashi; Kabuto, Shoji*

Dai-15-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.1 - 6, 2003/03

no abstracts in English

Journal Articles

The Present condition of a Tandetron AMS in JAERI-Mutsu

Kitamura, Toshikatsu; Togawa, Orihiko; Aramaki, Takafumi; Suzuki, Takashi; Mizutani, Yoshihiko*; Kabuto, Shoji*; Sudo, Kazuhiko*

JNC TN7200 2001-001, p.31 - 34, 2002/01

no abstracts in English

Journal Articles

The Present condition of a tandetron AMS in JAERI-Mutsu

Kitamura, Toshikatsu; Aramaki, Takafumi; Mizutani, Yoshihiko*; Togawa, Orihiko; Mizushima, Toshihiko; Kabuto, Shoji*; Sudo, Kazuhiko*

JAERI-Conf 2000-019, p.26 - 29, 2001/02

no abstracts in English

Journal Articles

A 3 MV heavy element AMS system using a unique TOF set-up

Gottdang, A.*; Klein, M.*; Mous, D. J. W.*; Kitamura, Toshikatsu; Mizutani, Yoshihiko*; Suzuki, Takashi; Aramaki, Takafumi; Togawa, Orihiko; Kabuto, Shoji*; Sudo, Kazuhiko*

AIP Conference Proceedings 576, p.403 - 406, 2001/00

no abstracts in English

Journal Articles

New AMS system at the JAERI-Mutsu

Aramaki, Takafumi; Togawa, Orihiko; Kitamura, Toshikatsu

Proceedings of the International Workshop on Distribution and Speciation of Radionuclides in the Environment, p.350 - 353, 2000/00

no abstracts in English

28 (Records 1-20 displayed on this page)