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首页> 外文期刊>Physical Review C >Fission fragment yield distribution in the heavy-mass region from the ~((239) Pu (nth, f ) reaction
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Fission fragment yield distribution in the heavy-mass region from the ~((239) Pu (nth, f ) reaction

机译：来自〜（（239）PU（NTH，F）反应的重质区块中的裂变片段产量分布

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摘要

The fission fragment yield distribution has been measured in the ~(239)Pu (nth,f ) reaction in the mass region of A = 126 to 150 using the Lohengrin recoil-mass spectrometer. Three independent experimental campaigns were performed, allowing a significant reduction of the uncertainties compared to evaluated nuclear data libraries. The long-standing discrepancy of around 10% for the relative yield of A = 134 reported in JEF-2.2 and JEFF-3.1.1 data libraries is finally solved.Moreover, the measured mass distribution in thermal neutron-induced fission does not show any significant dip around the shell closure (A = 136) as seen in heavy-ion fission data of ~(208)Pb(~(18)O, f ) and ~(238)U(~(18)O, f ) reactions. Lastly, comparisons between our experimental data and the predictions from Monte Carlo codes (GEF and FIFRELIN) are presented and discussed.
机译：使用Lohengrin Recoil质谱仪，在〜（239）PU（NtH，F）反应中测量了裂变片段产率分布。与评估的核数据库相比，进行了三个独立的实验活动，允许显着降低不确定性。在JEF-2.2和Jeff-3.1.1数据库中报告的A = 134的相对产量约为10％的长期差异。此外，热中子诱导裂变中的测量质量分布不会显示任何在壳封闭（a = 136）周围的大致浸渍，如〜（208）Pb（〜（18）o，f）和〜（238）U（〜（18）o，f）反应的重离离子裂变数据。最后，提出并讨论了我们的实验数据与来自蒙特卡罗代码（GEF和FIFRELIN）的预测之间的比较。

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  • 来源
    《Physical Review C》 |2017年第2017期|014608.1-014608.10|共10页
  • 作者

    Y. K. Gupta; D. C. Biswas; O. Serot; D. Bernard; O. Litaize; S. Julien- Laferriere; A. Chebboubi; G. Kessedjian; C. Sage; A. Blanc; H. Faust; U. Koester; A. Ebran; L. Mathieu; A. Letourneau; T. Materna; S. Panebianco;

  • 作者单位

    Nuclear Physics Division Bhabha Atomic Research Centre Mumbai 400085 India;

    Nuclear Physics Division Bhabha Atomic Research Centre Mumbai 400085 India;

    CEA DEN DER SPRC Physics Studies Laboratory Cadarache F-13108 Saint Paul Lez Durance France;

    CEA DEN DER SPRC Physics Studies Laboratory Cadarache F-13108 Saint Paul Lez Durance France;

    CEA DEN DER SPRC Physics Studies Laboratory Cadarache F-13108 Saint Paul Lez Durance France;

    LPSC Universite Grenoble-Alpes F-38000 Grenoble France;

    LPSC Universite Grenoble-Alpes F-38000 Grenoble France;

    LPSC Universite Grenoble-Alpes F-38000 Grenoble France;

    LPSC Universite Grenoble-Alpes F-38000 Grenoble France;

    Institut Laue Langevin F-38042 Grenoble France;

    Institut Laue Langevin F-38042 Grenoble France;

    Institut Laue Langevin F-38042 Grenoble France;

    CEA DAM-Bruyeres-Le-Chatel F- 91290 Arpajon France;

    CEN Bordeaux Gradignan F-33175 Gradignan France;

    CEA DRF- Saclay F-91191 Gif-sur-Yvette France;

    CEA DRF- Saclay F-91191 Gif-sur-Yvette France;

    CEA DRF- Saclay F-91191 Gif-sur-Yvette France;

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