The 239 Pu(n,2n)238Pu cross section: preliminary calculations

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The primary motivation for the present work is to provide theoretical values for the ratio of the partial <sup>239</sup>Pu(n,2nx{gamma})<sup>238</sup>Pu to total <sup>239</sup> Pu(n,2n)<sup>238</sup>Pu cross section for several discrete gamma transitions. Results and conclusions of preliminary calculations from threshold to 20 MeV are presented. Calculations are based on theoretical models with parameters obtained from the literature or from our ad hoc systematics. Optical model cross sections and transmission coefficients were determined using the coupled-channels method. The calculations included a preequilibrium component followed by multiple particle and gamma-ray emissions. Fission competition was included at all stages of de-excitation. Suggestions for further verifications ... continued below

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Chen, H.; Reffo, G.; Ross, M. A. & White, R. M. March 12, 1999.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times , with 4 in the last month . More information about this report can be viewed below.

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Description

The primary motivation for the present work is to provide theoretical values for the ratio of the partial <sup>239</sup>Pu(n,2nx{gamma})<sup>238</sup>Pu to total <sup>239</sup> Pu(n,2n)<sup>238</sup>Pu cross section for several discrete gamma transitions. Results and conclusions of preliminary calculations from threshold to 20 MeV are presented. Calculations are based on theoretical models with parameters obtained from the literature or from our ad hoc systematics. Optical model cross sections and transmission coefficients were determined using the coupled-channels method. The calculations included a preequilibrium component followed by multiple particle and gamma-ray emissions. Fission competition was included at all stages of de-excitation. Suggestions for further verifications and possible improvements are provided.

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  • Other: DE00014549
  • Report No.: UCRL-ID-133497
  • Grant Number: W-7405-Eng-48
  • DOI: 10.2172/14549 | External Link
  • Office of Scientific & Technical Information Report Number: 14549
  • Archival Resource Key: ark:/67531/metadc625733

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  • March 12, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 8:56 p.m.

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Chen, H.; Reffo, G.; Ross, M. A. & White, R. M. The 239 Pu(n,2n)238Pu cross section: preliminary calculations, report, March 12, 1999; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc625733/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.