Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 29

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

Coupled THMC analysis for predicting hydro-mechanical evolution in siliceous mudstone

Ogata, Sho*; Yasuhara, Hideaki*; Aoyagi, Kazuhei; Kishida, Kiyoshi*

Proceedings of 53rd US Rock Mechanics/Geomechanics Symposium (USB Flash Drive), 6 Pages, 2019/06

Journal Articles

Nuclear data evaluation of long-lived fission products; Microscopic vs. phenomenological optical potentials

Minato, Futoshi; Iwamoto, Osamu; Minomo, Kosho*; Ogata, Kazuyuki*; Iwamoto, Nobuyuki; Kunieda, Satoshi; Furutachi, Naoya

EPJ Web of Conferences (Internet), 146, p.12032_1 - 12032_4, 2017/09

 Percentile:100

Phenomenological optical potential is known to be able to describe the elastic scattering process. It is applied widely to the nuclear data evaluation of the cross section. Many kinds of the optical potential have been studied so far. However, the parameters in the phenomenological optical potentials are determined so as to reproduce existing experimental data, so that use of it for unmeasured nuclei such as neutron-rich nuclei is not necessarily reliable. Recently, a new optical potential derived from the microscopic effective reaction theory (MERT) was proposed. Since the formulation of MERT is based on the NN effective interaction, any parameterizations in the optical potential aren't needed. Therefore, it is capable of calculating nuclei whose scattering cross section isn't measured. We incorporate the optical potentials of MERT in code CCONE and start nuclear data evaluation of several nuclei. In this work, we discuss difference of cross sections evaluated by MERT's optical potentials and conventional phenomenological ones.

Journal Articles

Determination of the $$^8{rm B}(p,gamma)^9{rm C}$$ reaction rate through direct nuclear reaction theories

Fukui, Tokuro; Ogata, Kazuyuki*; Minomo, Kosho*; Yahiro, Masanobu*

JPS Conference Proceedings (Internet), 14, p.020513_1 - 020513_3, 2017/02

Journal Articles

Asymmetry dependence of reduction factors from single-nucleon knockout of $$^{30}$$Ne at $$sim$$ 230 MeV/nucleon

Lee, J.*; Liu, H.*; Doornenbal, P.*; Kimura, Masaaki*; Minomo, Kosho*; Ogata, Kazuyuki*; Utsuno, Yutaka; Aoi, Nori*; Li, K.*; Matsushita, Masafumi*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2016(8), p.083D01_1 - 083D01_7, 2016/08

AA2016-0230.pdf:0.16MB

 Times Cited Count:3 Percentile:52.65(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Development of a calculation code system for evaluation of deuteron nuclear data

Nakayama, Shinsuke*; Araki, Shohei*; Watanabe, Yukinobu*; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*

Energy Procedia, 71, p.219 - 227, 2015/05

 Times Cited Count:9 Percentile:0.42

A calculation code system for evaluation of deuteron nuclear data is extended so that the stripping reaction to bound states in the residual nucleus can be taken into account properly using a conventional zero-range DWBA approach. The code system is applied to deuteron induced-reactions on $$^{27}$$Al for incident energies up to 100 MeV. It is found that the spectroscopic factors derived from the present DWBA analysis have incident energy dependence. The calculation using the extended code system reproduced experimental double-differential (d,xp) cross sections at 25.5, 56, and 100 MeV, and production cross sections of $$^{28}$$Al in the incident energy range from the threshold to 20 MeV.

Journal Articles

Cross section calculations of deuteron-induced reactions using the extended CCONE code

Nakayama, Shinsuke*; Araki, Shohei*; Watanabe, Yukinobu*; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*

Nuclear Data Sheets, 118, p.305 - 307, 2014/04

 Times Cited Count:10 Percentile:28.23(Physics, Nuclear)

The CCONE code has been extended so as to make it possible to calculate the cross sections for deuteron-induced reactions. In the extended CCONE code, elastic breakup and stripping reactions to continuum are calculated using the Continuum-Discretized Coupled-Channels theory (CDCC) and the Glauber model, respectively, and the calculated results are inputted to the CCONE codeas direct reaction components. Statistical decay from compound nuclei formed by nucleon stripping and deuteron absorption is calculated with the exciton and Hauser-Feshbach models implemented in the original CCONE code. The extended CCONE code is applied to analyses of deuteron-induced reactions on $$^{27}$$Al and $$^{58}$$Ni. CDCC calculations for deuteron elastic scattering show good agreement with the experimental data at incident energies of several tens of MeV. The calculated double-differential ($$d$$, $$xp$$) cross sections reproduce the measured ones at forward angles for incidentenergies of 56 and 100 MeV fairly well.

Journal Articles

Characterization of monolayer oxide formation processes on high-index Si surface by photoelectron spectroscopy with synchrotron radiation

Abe, Sosuke*; Ono, Shinya*; Kanemura, Rui*; Yoshigoe, Akitaka; Teraoka, Yuden; Ogata, Shoichi*; Yasuda, Tetsuji*; Tanaka, Masatoshi*

Applied Physics Express, 6(11), p.115701_1 - 115701_4, 2013/11

 Times Cited Count:2 Percentile:86.1(Physics, Applied)

Journal Articles

Time-evolution of thermal oxidation on high-index silicon surfaces; Real-time photoemission spectroscopic study with synchrotron radiation

Ono, Shinya*; Inoue, Kei*; Morimoto, Masahiro*; Arae, Sadanori*; Toyoshima, Hiroaki*; Yoshigoe, Akitaka; Teraoka, Yuden; Ogata, Shoichi*; Yasuda, Tetsuji*; Tanaka, Masatoshi*

Surface Science, 606(21-22), p.1685 - 1692, 2012/11

 Times Cited Count:6 Percentile:63.42(Chemistry, Physical)

Journal Articles

Status of breakup reaction theory

Ogata, Kazuyuki*; Matsumoto, Takuma*; Hashimoto, Shintaro; Minomo, Kosho*; Egami, Tomoaki*; Iseri, Yasunori*; Kono, Michio*; Chiba, Satoshi; Bertulani, C. A.*; Shimizu, Yoshifumi*; et al.

Journal of Physics; Conference Series, 312, p.082008_1 - 082008_10, 2011/09

 Times Cited Count:1 Percentile:46.63

Recent studies on breakup reactions with the continuum-discretized coupled channels method are reviewed. The topics covered are: four-body breakup processes for $$^6$$He induced reaction, dynamical relativistic effects on coulomb breakup, microscopic description of projectile breakup processes, description of ternary processes (new triple-$$alpha$$ reaction rate) and new approach to inclusive breakup processes.

Journal Articles

Characterization of initial oxidation process on high-index silicon surfaces by real-time photoemission spectroscopy

Ono, Shinya*; Inoue, Kei*; Morimoto, Masahiro*; Arae, Sadanori*; Toyoshima, Hiroaki*; Yoshigoe, Akitaka; Teraoka, Yuden; Ogata, Shoichi*; Yasuda, Tetsuji*; Tanaka, Masatoshi*

Shingaku Giho, 111(114), p.23 - 27, 2011/07

The initial oxidation on high-index silicon surfaces with (113) and (120) orientations at 820 K has been investigated by real-time X-ray photoemission spectroscopy (Si 2p and O 1s) using 687 eV photons. The time evolutions of the Si$$^{n+}$$ (n=1-4) components in the Si 2p spectrum indicate that the Si$$^{2+}$$ state is suppressed on high-index surfaces compared with Si(001). The O 1s state consists of two components, a low-binding-energy component (LBC) and a high-binding-energy component (HBC). It is suggested that the O atom in strained Si-O-Si contributes to the LBC component. The reaction rates are slower on high-index surfaces compared with that on Si(001).

Journal Articles

Effective radii of deuteron-induced reactions

Hashimoto, Shintaro; Yahiro, Masanobu*; Ogata, Kazuyuki*; Minomo, Kosho*; Chiba, Satoshi

Physical Review C, 83(5), p.054617_1 - 054617_11, 2011/05

 Times Cited Count:14 Percentile:26.67(Physics, Nuclear)

The continuum-discretized coupled-channels method (CDCC) for exclusive reactions and the eikonal reaction theory (ERT) as an extension of CDCC to inclusive reactions are applied to deuteron induced reactions. The CDCC result reproduces experimental data on the reaction cross section for $$d+^{58}$$Ni scattering at 200 MeV/nucleon and ERT does data on the neutron-stripping cross section for inclusive $$^7$$Li$$(d,n)$$ reaction at 40 MeV. For deuteron induced reactions at 200 MeV/nucleon, target-dependence of the reaction, elastic-breakup, nucleon-stripping, nucleon-removal, complete- and incomplete-fusion cross sections is clearly explained by simple formulae. Accuracy of the Glauber model is also investigated.

JAEA Reports

Assessment of uncertainties associated with characterization of geological environment in the Tono area; Japanese fiscal year, 2006 (Contract research)

Toida, Masaru*; Suyama, Yasuhiro*; Seno, Shoji*; Atsumi, Hiroyuki*; Ogata, Nobuhisa

JAEA-Research 2008-035, 89 Pages, 2008/03

JAEA-Research-2008-035.pdf:5.66MB

"Geoscientific research" performed at the Tono Geoscience Center is developing site investigation, characterization and assessment techniques for understanding of geological environment. Their important themes are to establish a methodology for analyzing uncertainties in heterogeneous geological environment, and to develop investigation techniques for reducing the uncertainties efficiently. This study proposes a new approach where all the possible options in the models and data-sets that cannot be excluded in the light of the evidence available, are identified. This approach enables uncertainties associated with the understanding at a given stage of the site characterization to be made explicitly using an uncertainty analysis technique based on Fuzzy geostatistics. This, in turn, supports the design of the following investigation stage to reduce the uncertainties efficiently. In the study, current knowledge had been compiled, and the technique had been advanced through geological modeling and groundwater analyses in the Tono area. This report systematized the uncertainty analysis methodology associated with the characterization of the geological environment, and organized the procedure of the methodology with the application examples in the study. This report also dealt with investigation techniques for reducing the uncertainties efficiently, and underground facility design options for handling geological uncertainties based on the characterization of the geological environment.

Journal Articles

Measurement of Thermal Neutron Capture Cross Section and Resonance Integral of the $$^{129}$$I(n,$$gamma$$) $$^{130}$$I Reaction

Nakamura, Shoji; Harada, Hideo; Kato, Toshio; Ogata, Yoshimune*

Journal of Nuclear Science and Technology, 33(4), p.283 - 289, 1996/00

None

Journal Articles

Measurement of thermal neutron cross section and resonance integral of the reaction $$^{99}$$Tc($$n, gamma$$)$$^{100}$$Tc

Harada, Hideo; Nakamura, Shoji; Kato, Toshio*; Ogata, Yoshimune*

Journal of Nuclear Science and Technology, 32(5), p.395 - 403, 1995/05

None

Journal Articles

Measurements of thermal neutron capture cross sections and resonance integrals of long-lived fission product nuclei

Kato, Toshio*; Ogata, Yoshimune*; Harada, Hideo; Nakamura, Shoji; Sekine, Toshiaki*; Hatsukawa, Yuichi*

Proceedings of International Conference on Evaluation of Emerging Nuclear Fuel Cycle Systems (GLOBAL'95), p.1552 - 1559, 1995/00

no abstracts in English

Oral presentation

Residual stress measurements using synchrotron X-ray on nickel-based superalloy at cryogenic temperatures

Akita, Koichi*; Ono, Yoshinori*; Shobu, Takahisa; Miyashita, Daisuke*; Yuri, Tetsumi*; Ogata, Toshio*; Oya, Shinichi*

no journal, , 

Oral presentation

Measurements of residual stress distribution on peened nickel-based superalloy at cryogenic temperatures

Miyashita, Daisuke*; Akita, Koichi*; Oya, Shinichi*; Ono, Yoshinori*; Ogata, Toshio*; Yuri, Tetsumi*; Shobu, Takahisa

no journal, , 

no abstracts in English

Oral presentation

Real-time photoemission spectroscopy measurements of high-index Si surfaces

Ono, Shinya*; Inoue, Kei*; Morimoto, Masahiro*; Arae, Sadanori*; Toyoshima, Hiroaki*; Yoshigoe, Akitaka; Teraoka, Yuden; Ogata, Shoichi*; Yasuda, Tetsuji*; Tanaka, Masatoshi*

no journal, , 

A 3$$times$$2 reconstruction surface is made at the Si(113) surface. The oxidation processes by O$$_{2}$$ molecules were observed by real-time photoelectron spectroscopy. All experiments were conducted using the JAEA surface chemistry experimental station at BL23SU in the SPring-8. Time evolution of Si2p and O1s photoelectron spectra were observed. A suboxide Si$$^{3+}$$ component ratio increased during oxidation as the Si(110) surface case. Both of Si(110) and (113) surfaces have a pentagon structure on the reconstruction surface. The increase of Si$$^{3+}$$ component in the oxidation of the Si(11n) surface can be understood as competing formation of an SiO$$_{2}$$/Si(001) type interface and an SiO$$_{2}$$/Si(111) type interface.

Oral presentation

Real-time photoemission spectroscopy measurements of initial oxidation process of high-index Si surfaces

Ono, Shinya*; Inoue, Kei*; Morimoto, Masahiro*; Arae, Sadanori*; Toyoshima, Hiroaki*; Yoshigoe, Akitaka; Teraoka, Yuden; Ogata, Shoichi*; Yasuda, Tetsuji*; Tanaka, Masatoshi*

no journal, , 

no abstracts in English

Oral presentation

Analysis of initial oxidation process of high-index Si surfaces using supersonic molecular beam

Ono, Shinya*; Inoue, Kei*; Momose, Tatsuya*; Kanemura, Rui*; Yoshigoe, Akitaka; Teraoka, Yuden; Ogata, Shoichi*; Yasuda, Tetsuji*; Tanaka, Masatoshi*

no journal, , 

no abstracts in English

29 (Records 1-20 displayed on this page)