Resonance Region Covariance Analysis Method and New Covariance Data for 232Th, 233U, 235U, 238U, and 239Pu

L. C. Leal; G. Arbanas; D. Wiarda; H. Derrien

doi:10.1016/j.nds.2008.11.025

Resonance Region Covariance Analysis Method and New Covariance Data for ²³²Th, ²³³U, ²³⁵U, ²³⁸U, and ²³⁹Pu

L. C. Leal, G. Arbanas, D. Wiarda, H. Derrien

Nuclear Data

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Resonance-parameter covariance matrix (RPCM) evaluations in the resolved resonance region were done for ²³²Th, ²³³U, ²³⁵U, ²³⁸U, and ²³⁹Pu using the computer code SAMMY. The retroactive approach of the code SAMMY was used to generate the RPCMs for ²³³U and ²³⁵U. RPCMs for ²³²Th, ²³⁸U and ²³⁹Pu were generated together with the resonance parameter evaluations. The RPCMs were then converted in the ENDF format using the File32 representation. Alternatively, for computer storage reasons, the File32 was converted in the File33 cross section covariance matrix (CSCM). Both representations were processed using the computer code PUFF-IV. This paper describes the procedures used to generate the RPCM with SAMMY.

Original language	English
Pages (from-to)	2868-2873
Number of pages	6
Journal	Nuclear Data Sheets
Volume	109
Issue number	12
DOIs	https://doi.org/10.1016/j.nds.2008.11.025
State	Published - Dec 2008

Funding

This work was sponsored by the U.S. Department of Energy Nuclear Criticality Safety Program (NCSP), under contract DE-AC05-00OR22725 with UT-Battelle, LLC.

Funders	Funder number
U.S. Department of Energy Nuclear Criticality Safety Program	DE-AC05-00OR22725 with UT-Battelle

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10.1016/j.nds.2008.11.025

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abstract = "Resonance-parameter covariance matrix (RPCM) evaluations in the resolved resonance region were done for 232Th, 233U, 235U, 238U, and 239Pu using the computer code SAMMY. The retroactive approach of the code SAMMY was used to generate the RPCMs for 233U and 235U. RPCMs for 232Th, 238U and 239Pu were generated together with the resonance parameter evaluations. The RPCMs were then converted in the ENDF format using the File32 representation. Alternatively, for computer storage reasons, the File32 was converted in the File33 cross section covariance matrix (CSCM). Both representations were processed using the computer code PUFF-IV. This paper describes the procedures used to generate the RPCM with SAMMY.",

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AU - Derrien, H.

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AB - Resonance-parameter covariance matrix (RPCM) evaluations in the resolved resonance region were done for 232Th, 233U, 235U, 238U, and 239Pu using the computer code SAMMY. The retroactive approach of the code SAMMY was used to generate the RPCMs for 233U and 235U. RPCMs for 232Th, 238U and 239Pu were generated together with the resonance parameter evaluations. The RPCMs were then converted in the ENDF format using the File32 representation. Alternatively, for computer storage reasons, the File32 was converted in the File33 cross section covariance matrix (CSCM). Both representations were processed using the computer code PUFF-IV. This paper describes the procedures used to generate the RPCM with SAMMY.

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Resonance Region Covariance Analysis Method and New Covariance Data for ²³²Th, ²³³U, ²³⁵U, ²³⁸U, and ²³⁹Pu

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