Phys Rev Lett 119: Novel Role of Superfluidity in Low-Energy Nuclear Reactions (Heavy ion fusion).

    • Official Post

    From The New Fire on twitter, an interesting article (or not), to be analysed by competent eyes.


    https://arxiv.org/abs/1611.10261

    https://doi.org/10.1103/PhysRevLett.119.042501

    https://journals.aps.org/prl/a…03/PhysRevLett.119.042501


    Novel Role of Superfluidity in Low-Energy Nuclear Reactions

    Phys. Rev. Lett. 119, 042501 – Published 25 July 2017

    ABSTRACT

    We demonstrate, within symmetry unrestricted time-dependent density functional theory, the existence of new effects in low-energy nuclear reactions which originate from superfluidity. The dynamics of the pairing field induces solitonic excitations in the colliding nuclear systems, leading to qualitative changes in the reaction dynamics. The solitonic excitation prevents collective energy dissipation and effectively suppresses the fusion cross section. We demonstrate how the variations of the total kinetic energy of the fragments can be traced back to the energy stored in the superfluid junction of colliding nuclei. Both contact time and scattering angle in noncentral collisions are significantly affected. The modification of the fusion cross section and possibilities for its experimental detection are discussed.


    As I understand this is not the cold fusion "LENR", but the Heavy-Ions LENR, like plutonium nucleus, assuming the nuclei inside the respective nucleus are considered superfluid.


    I cannot judge the quality of the paper, but the abstract propose that fusion cross section is suppressed, which could support the "slow fusion" concept of Edmund Storms, explaining why there are seldom energetic outcome (no 24MeV gamma or alike)...


    Anyway this does not directly applies to Cold Fusion LENR, but it may raise ideas...

    “Only puny secrets need keeping. The biggest secrets are kept by public incredulity.” (Marshall McLuhan)
    twitter @alain_co

  • So looking at this quickly:


    This effect reduces fusion probability in this specific case

    The reduction is from around a 30MeV increase on a 190MeV barrier height

    The work is theoretical, and based on a superfluid which can fuse.

    This mechanism is not relevant to collective fusion energy dispersal - although it does exhibit collective pre-fusion energy dispersal (where the time scale is much larger). Energy dispersal mechanisms before fusion of course tend to reduce the fusion rate.

  • "The solitonic excitation prevents collective energy dissipation and effectively suppresses the fusion cross section. "


    A suppressed fusion cross section is another way of saying "a reduced rate of fusion."


    To Ahlfor's snippet, though: it's interesting that there is another parameter that factors into the fusion cross section (relative phase of the "pairing condensates") than previously contemplated. That begs the question: what other unexplored parameters are there?


    But, most important: does LENR involve fusion? My working assumption is that it does not.

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