Low Energy Nuclear Fission

  • H. Nifenecker
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 67)


Fifteen years after the discovery of the fission process1–3) a very important step was made towards the synthesis of the shell7) and liquid drop model3–6). This was the unified model of Bohr and Mottelson,9 and Mottelson and Nilsson,10. In this model the nuclear potential is allowed to be deformed. This deformation induces a deformation of the nuclear matter density which should be consistent with the potential itself. This was the socalled self consistent approach. In this approach the self consistency was not required in “detail” but on the second moments of the potential and density distributions. The potential was therefore related to smoothed average density. It was also recognized by Swiatecki et al.,11 that all systems with “leptodermous” (thin-skin) density distribution should behave as liquid drops, (as far as their potential energy goes). Was the liquid drop model related to the average density responsible for the self consistent average potential? The answer to this question would have still to wait more than ten years. The Nilsson model was able to account very satisfactorily for ground state deformations but failed at large deformations and predicted much too strong stabilities of nuclei towards fission. The real break through was made in 1966 by Myers and Swiatecki,12 and Strutinsky,13.


Saddle Point Level Density Liquid Drop Fission Fragment Shell Correction 


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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • H. Nifenecker
    • 1
  1. 1.Département de Recherche Fondamentale, C.P.N.Centre d’Etudes Nucléaires de GrenobleGrenoble CedexFrance

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