<sup>239</sup>Pu neutron resonance parameters revisited and covariance matrix in the neutron energy range from thermal to 2.5 keV

Derrien, H.; Leal, L.C.; Larson, N. M.

doi:10.1051/ndata:07374

Cited by 5 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The RRPs of 239;241 Pu were taken from the SAMMY analyses performed by Derrien et al 95,96) Those of 236;240;242;244 Pu were based on JENDL-3.3, but modified except for 240 Pu. The RRPs of 238 Pu were newly evaluated.…”

Section: )mentioning

confidence: 99%

JENDL-4.0: A New Library for Nuclear Science and Engineering

Shibata

Iwamoto

Nakagawa

et al. 2011

J. Nucl. Sci. Technol.

167

152

View full text Add to dashboard Cite

The fourth version of the Japanese Evaluated Nuclear Data Library has been produced in cooperation with the Japanese Nuclear Data Committee. In the new library, much emphasis is placed on the improvements of fission product and minor actinoid data. Two nuclear model codes were developed in order to evaluate the cross sections of fission products and minor actinoids. Coupled-channel optical model parameters, which can be applied to wide mass and energy regions, were obtained for nuclear model calculations. Thermal cross sections of actinoids were carefully examined by considering experimental data or by the systematics of neighboring nuclei. Most of the fission cross sections were derived from experimental data. A simultaneous evaluation was performed for the fission cross sections of important uranium and plutonium isotopes above 10 keV. New evaluations were performed for the thirty fissionproduct nuclides that had not been contained in the previous library JENDL-3.3. The data for light elements and structural materials were partly reevaluated. Moreover, covariances were estimated mainly for actinoids. The new library was released as JENDL-4.0, and the data can be retrieved from the Web site of the JAEA Nuclear Data Center.

show abstract

Section: )mentioning

confidence: 99%

JENDL-4.0: A New Library for Nuclear Science and Engineering

Shibata

Iwamoto

Nakagawa

et al. 2011

J. Nucl. Sci. Technol.

167

152

View full text Add to dashboard Cite

show abstract

“…The 239 Pu work represents a reevaluation effort of the resonance parameters by Derrien, and the corresponding RPCM was prepared using the PUP option in SAMMY. Note that the paper concerning 239 Pu is published at this conference [17], and the reader should refer to this paper for a specific example that demonstrates the treatment of uncertainties in the evaluation effort.…”

Section: Treatment Of Uncertainties: Recent Advances and Opportunitiementioning

confidence: 99%

“…Details concerning the resonance parameter covariance evaluation effort are published for 233 U [15], 238 U [16] and 239 Pu [17], respectively. The authors plan to publish the resonance parameter covariance work for 235 U in the future.…”

Section: Treatment Of Uncertainties: Recent Advances and Opportunitiementioning

confidence: 99%

Perspective on advances in resonance-region nuclear modeling and opportunities for future research

Dunn

Larson

Derrien

et al. 2007

Nd2007

Self Cite

View full text Add to dashboard Cite

Abstract. The advent of high-fidelity radiation-transport modeling capabilities, coupled with the need to analyze complex nuclear systems, has served to emphasize the importance of high-precision cross section data, including the associated covariance information. Due to the complex nature of resonance-region interactions, cross section data cannot be calculated directly from theory; rather, high-precision resonance-region cross section measurements must be made at facilities such as the Oak Ridge Electron Linear Accelerator (ORELA) at Oak Ridge National Laboratory (ORNL), Geel Electron Linear Accelerator (GELINA), Rensselaer Polytechnic Institute (RPI). To extract accurate cross section data from these measurements, detailed nuclear modeling of the measured data is performed to parameterize the cross section behavior in the resonance range. The objective of this paper is to highlight recent advances in resonance-region nuclear modeling with particular emphasis on the covariance analysis capabilities. Opportunities for future research are identified in an effort to stimulate further advances in the state of the art nuclear modeling capabilities.

show abstract

“…[10][11][12][13][14] We adopted their results for these nuclides. For 235 U, the parameters of JENDL-3.3 were carried over, but the upper limit of the resolved resonance region was changed to 500 eV.…”

Section: Resonance Parametersmentioning

confidence: 99%

JENDL Actinoid File 2008

Iwamoto

Nakagawa

Otuka

et al. 2009

J. Nucl. Sci. Technol.

View full text Add to dashboard Cite

JENDL Actinoid File 2008 (JENDL/AC-2008) was released in March 2008. It includes nuclear data for neutron-induced reactions for 79 nuclides from Ac (Z ¼ 89) to Fm (Z ¼ 100). The neutron energy range is 10 À5 eV to 20 MeV. Almost all data for 62 actinoids in JENDL-3.3 were revised. New evaluations were performed for 17 nuclides, which have half-lives longer than one day. A new comprehensive theoretical model code CCONE was widely used for the evaluation of cross sections and neutron emission spectra. Thermal cross sections for many nuclides were revised based on experimental data. Resonance parameters were readjusted to reproduce them. Simultaneous evaluations of fission cross sections were performed for six important nuclei. The least-squares fitting code GMA was used for the evaluation of fission cross sections for minor actinoids. In this paper, we present the evaluation methods and results of the JENDL/AC-2008.

show abstract

²³⁹Pu neutron resonance parameters revisited and covariance matrix in the neutron energy range from thermal to 2.5 keV

Cited by 5 publications

References 9 publications

JENDL-4.0: A New Library for Nuclear Science and Engineering

JENDL-4.0: A New Library for Nuclear Science and Engineering

Perspective on advances in resonance-region nuclear modeling and opportunities for future research

JENDL Actinoid File 2008

Contact Info

Product

Resources

About

239Pu neutron resonance parameters revisited and covariance matrix in the neutron energy range from thermal to 2.5 keV

Cited by 5 publications

References 9 publications

JENDL-4.0: A New Library for Nuclear Science and Engineering

JENDL-4.0: A New Library for Nuclear Science and Engineering

Perspective on advances in resonance-region nuclear modeling and opportunities for future research

JENDL Actinoid File 2008

Contact Info

Product

Resources

About

²³⁹Pu neutron resonance parameters revisited and covariance matrix in the neutron energy range from thermal to 2.5 keV