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The potential energy surface of $^{240}$Pu around scission

Abstract : The potential energy surface of $^{240}$Pu is analyzed in the scission region within an elaborate macroscopic-microscopic approach, using the Lublin-Strasbourg-drop model, an improved Strutinsky shell-correction method and the BCS (Bardeen-Cooper-Schrieffer) treatment of pairing. The modified funny-hills nuclear shape parameterization, used in the present study, is further improved by introducing new collective coordinates $\kappa$ and $\psi$ for the elongation and neckconstriction. These variables are shown to be very well suited for the scission region. Within a limited number of dimensions, the model is able to explain fission modes in the actinide region. More specifically, the present work indicates that the peak of the mass distribution at A ≈ 140 in the low-energy fission of $^{240}$Pu is mainly caused by strong neutron shell corrections.
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Submitted on : Thursday, June 12, 2014 - 3:18:09 PM
Last modification on : Thursday, January 6, 2022 - 4:58:01 PM




J. Bartel, B. Nerlo-Pomorska, K. Pomorski, C. Schmitt. The potential energy surface of $^{240}$Pu around scission. Physica Scripta, IOP Publishing, 2014, 89, pp.054003. ⟨10.1088/0031-8949/89/5/054003⟩. ⟨in2p3-01005405⟩



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