Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 154

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

U-Pb dating of calcium carbonate using LA-ICP-MS

Yokoyama, Tatsunori

Isotope News, (764), p.11 - 14, 2019/08

no abstracts in English

Journal Articles

Gross beta radioactivity measurement method and nuclear fallout

Tsujimura, Norio

Isotope News, (763), p.42 - 43, 2019/06

no abstracts in English

Journal Articles

Estimation of the therapeutic effect of BNCT based on the dose distributions in cellular scale

Sato, Tatsuhiko

Isotope News, (760), p.2 - 5, 2018/12

Recently, we proposed a new model for estimating the biological effectiveness for Boron Neutron Capture Therapy (BNCT) based on the absorbed dose distributions in cellular scale. The model quantitatively highlighted the indispensable need to consider the synergetic effect and the dose dependence of the biological effectiveness in the estimate of the therapeutic effect of BNCT. This paper reviews the basic features of the model.

Journal Articles

Development of novel alumina adsorbent applying mesoporous process

Fukumitsu, Nobuyoshi*; Yamauchi, Yusuke*; Saptiama, I.*; Ariga, Katsuhiko*; Hatano, Kentaro*; Kumada, Hiroaki*; Fujita, Yoshitaka; Tsuchiya, Kunihiko

Isotope News, (760), p.15 - 18, 2018/12

no abstracts in English

Journal Articles

Estimation of radionuclide deposition process by cloud and fog water at mountainous area; Comparison of observed data of airborne radiation monitoring and reproduction calculation

Sanada, Yukihisa; Katata, Genki*; Kaneyasu, Naoki*

Isotope News, (759), p.18 - 21, 2018/10

no abstracts in English

Journal Articles

A Three-dimensional imaging technique for radioactive contamination

Sato, Yuki; Torii, Tatsuo

Isotope News, (757), p.44 - 47, 2018/06

no abstracts in English

Journal Articles

Journal Articles

Nihonium, and the next elements...

Sakurai, Hiroshi*; Shinohara, Atsushi*; Koura, Hiroyuki; Kamigaito, Osamu*; Morimoto, Koji*; Haba, Hiromitsu*; Enyo, Hideto*

Isotope News, (特別号2), p.2 - 14, 2018/01

no abstracts in English

Journal Articles

How do cosmic-ray dose rates of public vary with nations?

Sato, Tatsuhiko

Isotope News, (752), p.50 - 53, 2017/08

After the release of the Report of the United Nations Scientific Committee of the Effects of Atomic Radiation in 2008 (UNSCEAR2008), it became commonly accepted that the world population-weighted effective dose due to cosmic-ray exposure is 0.38 mSv. However, this value was derived from approximate projections of altitude and geographic dependences of the cosmic-ray dose rates as well as the world population. We therefore re-evaluated the population-weighted annual effective doses and their probability densities for the entire world as well as for 230 individual nations, using a sophisticated cosmic-ray flux calculation model in tandem with detailed grid population and elevation databases. Outline and results of the evaluation are presented in this manuscript.

Journal Articles

Evaluation of nuclear data for application of isotopes

Iimura, Hideki

Isotope News, (746), p.39 - 42, 2016/08

Various nuclear data tables are available for radioisotopes users. In this article properties of these tables are compared. Also, it is explained how the recommended values in these tables are determined from f large amount of experimental data.

Journal Articles

Recent progress of the energy-resolved neutron imaging system at J-PARC

Kai, Tetsuya; Shinohara, Takenao

Isotope News, (746), p.20 - 24, 2016/08

no abstracts in English

Journal Articles

Summary of ICRP Symposium on Radiological Protection Dosimetry

Endo, Akira; Hamada, Nobuyuki*

Isotope News, (745), p.42 - 43, 2016/06

ICRP Symposium on Radiological Protection Dosimetry was held in Hongo campus, the University of Tokyo on February 18, 2016. Committee 2 of the International Commission on Radiological Protection (ICRP) is engaged in the development of dose coefficients for the assessment of internal and external radiation exposures; development of reference biokinetic and dosimetric models, and reference data for workers and members of the public. The symposium aimed at reviewing the current work of ICRP and discussing research needed for the ICRP System of radiological protection dosimetry. This article reviews the presentations and discussion in the symposium.

Journal Articles

Development of fuel debris removal techniques with lasers

Daido, Hiroyuki

Isotope News, (743), p.7 - 11, 2016/03

no abstracts in English

Journal Articles

Development of $$^{99}$$Mo/$$^{99m}$$Tc generator for the $$^{99}$$Mo/$$^{99m}$$Tc domestic production

Fukumitsu, Nobuyoshi*; Tsuchiya, Kunihiko; Ariga, Katsuhiko*; Yamauchi, Yusuke*

Isotope News, (742), p.20 - 24, 2016/02

no abstracts in English

Journal Articles

X-ray generation by collision of electron and laser beams

Hajima, Ryoichi; Terunuma, Nobuhiro*

Isotope News, (741), p.16 - 20, 2016/01

no abstracts in English

Journal Articles

Characteristics of radiation-induced bystander effect; Participation of nitric oxide

Yokota, Yuichiro; Funayama, Tomoo; Ikeda, Hiroko; Kobayashi, Yasuhiko

Isotope News, (741), p.21 - 25, 2016/01

Our article published on the International Journal of Radiation Biology (2015) was reviewed. We investigated the dependence of the bystander cell-killing effect on radiation dose and quality, and related molecular mechanisms. Human fibroblasts were irradiated with $$gamma$$-rays or carbon ions and co-cultured with non-irradiated cells. Survival rates of non-irradiated cells decreased and nitrite concentrations in co-culture medium increased with dose. Their dose responses were similar between $$gamma$$-rays and carbon ions. Treatment of the specific nitric oxide (NO) radical scavenger prevented reductions in survival rates of non-irradiated cells. Negative relationships were observed between survival rates and nitrite concentrations. From these results, it was concluded that the bystander cell-killing effect mediated by NO radicals depends on irradiation doses, but not on radiation quality. NO radical production appears to be an important determinant of bystander effects.

Journal Articles

Analytical procedure of Radiostrontium and Radiocesium in environmental sample

Fujita, Hiroki

Isotope News, (740), p.52 - 58, 2015/12

In this paper, analytical procedures of radioactive strontium and cesium written in Radioactivity Measurement Method Series compiled by MEXT are introduced with test method compiled by MHLW and recent procedures. Moreover, collection and pretreatment procedure of environmental sample are also described.

Journal Articles

The First ionization potential of element 103 successfully measured for the first time substantiated that lawrencium is the last member of actinide series

Sato, Tetsuya

Isotope News, (740), p.16 - 19, 2015/12

We successfully determined the first ionization potential of lawrencium (Lr, Z=103). The result experimentally substantiated for the first time that Lr is the last member of the actinide series. Measured ionization potential suggested that Lr atom would have the electronic configuration which is different from the configuration expected based on the Periodic table.

Journal Articles

Educational material kit to learn radiation effect on plastic

Nagasawa, Naotsugu; Taguchi, Mitsumasa

Isotope News, (736), p.47 - 50, 2015/08

no abstracts in English

154 (Records 1-20 displayed on this page)