GUPTA, Y.K.; BISWAS, D.C.; SEROT, O.; BERNARD, D.; LITAIZE, O.; JULIEN-LAFERRIÈRE, S.; CHEBBOUBI, A.; KESSEDJIAN, G.; SAGE, C.; BLANC, A.; FAUST, H.; KÖSTER, U.; EBRAN, A.; MATHIEU, L.; LETOURNEAU, A.; MATERNA, T.; PANEBIANCO, S.

doi:10.1103/PhysRevC.96.014608

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GUPTA, Y.K.

BISWAS, D.C.

SEROT, O.
CEA Cadarache

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Physical Review C. 2017, vol. 96, n° 1, p. 014608

American Physical Society

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The fission fragment yield distribution has been measured in the Pu239nth,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 Pb208(O18, f) and U238(O18, f) reactions. Lastly, comparisons between our experimental data and the predictions from Monte Carlo codes (gef and fifrelin) are presented and discussed.< Réduire

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Fission fragment yield distribution in the heavy-mass region from the <sup>239</sup>Pu(n<sub>th</sub>,f) reaction

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