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Journal Articles

Treatment of R-matrix Limited Formula in FRENDY

Tada, Kenichi; Kunieda, Satoshi

KURNS-EKR-5, p.229 - 232, 2019/12

The R-matrix limited formula is formatted by the current nuclear data format and it is adopted some nuclei in the latest evaluated nuclear data library. Since the processing of the R-matrix limited formula is significantly different to the other resonance formulae, it is difficult to treat this formula without large modification of the nuclear data processing code. In this study, we implemented one of the Rmatrix code AMUR to treat this formula in FRENDY. The processing results of FRENDY are compared to those of NJOY2016 to verify FRENDY. The comparison results indicate that FRENDY appropriately treat the R-matrix limited formula with similar computational time.

Journal Articles

Toward advancement of nuclear data research in the resonance region

Kunieda, Satoshi; Shibata, Keiichi; Fukahori, Tokio; Kawano, Toshihiko*; Paris, M.*; Hale, G.*

JAEA-Conf 2015-003, p.33 - 38, 2016/03

We present recent progress of nuclear data evaluation method in the resolved resonance range. Our multi-channel R-matrix code now includes photon-channel and computational capability of charged-particle elastic scattering. We also present the physical constraint from the theory in the analysis of experimental data. Example analysis results are shown for $$^8$$Be and $$^{17}$$O compound system. Finally, perspectives are discussed toward the advancement of nuclear data in the resonance region including those for medium-heavy nuclei.

Journal Articles

Uncertainty analyses in the resolved resonance region of $$^{235}U$$, $$^{238}U$$, and $$^{239}Pu$$ with the Reich-Moore $$R$$-matrix theory for JENDL-3.2

Kawano, Toshihiko*; Shibata, Keiichi

Journal of Nuclear Science and Technology, 39(8), p.807 - 815, 2002/08

 Times Cited Count:5 Percentile:35.97(Nuclear Science & Technology)

A simple method to estimate covariances for resolved resonance parameters was developed. Although a large number of resolved resonances are observed for major actinides, uncertainties in averaged cross sections are more important than those in resonance parameters in reactor calculations. The method developed here is to derive a covariance matrix for the resolved resonance parameters which gives an appropriate uncertainty of the averaged cross sections. The method was adopted to evaluate the covariance data for $$^{235}U$$, $$^{238}U$$, and $$^{239}Pu$$ resonance parameters in JENDL-3.2,with the Reich-Moore R-matrix formula.

Journal Articles

Study of one-dimentional Fermion model by the transfer-matrix method

;

Progress of Theoretical Physics, 75(1), p.46 - 58, 1986/00

 Times Cited Count:11 Percentile:64.13(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Radiation degradation of glass cloth reinforced epoxy composites; Effect of water and temperature

; Kawanishi, Shuichi; Hagiwara, Miyuki

EIM-84-130, p.19 - 25, 1984/00

no abstracts in English

Oral presentation

Proton-induced cross-section evaluation for $$^{6,7}$$Li in the resonance region

Kunieda, Satoshi

no journal, , 

Evaluated proton-induced cross-sections are required for lithium to design the neutron-source of BNCT. In this study, Coulomb and interference term are introduced into R-matrix code to calculate charged-particle elastic-scattering cross-sections. The experimental cross-sections, such as differential cross-sections of elastic-scattering and neutron production are analyzed/evaluated simultaneously for $$p+^{6,7}$$Li up to about 10 MeV. The results obtained will be included in the high-energy nuclear data library JENDL/4.0H.

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