Homepage Forums Aneutronic Fusion Energy Input/output at Each Point in the Aneutronic Fusion Process

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  • #1589
    Avatarmarkrh
    Participant

    What is the energy required to combine Boron 11 and Hydrogen nuclei to form carbon 12 and what is the energy output when the nucleus splits to become helium. It is unclear to me from where this differential in energy is derived.

    I have read somewhere that there is an up/down characteristic to P and N depending on the atomic number of the nuclei in question. Can some explain this to me with a reference to make this more clear?

    #13295
    AvatarFrancisl
    Participant

    markrh wrote: What is the energy required to combine Boron 11 and Hydrogen nuclei to form carbon 12 and what is the energy output when the nucleus splits to become helium. It is unclear to me from where this differential in energy is derived.

    I have read somewhere that there is an up/down characteristic to P and N depending on the atomic number of the nuclei in question. Can some explain this to me with a reference to make this more clear?

    Here is a link to a previous discussion on this topic.

    #13296
    AvatarIvy Matt
    Participant

    Proton-boron fusion begins to occur at an appreciable rate at about 100-150 keV ion energy. Optimum energies for proton-boron fusion are about 100-600 keV. Each reaction produces a total of 8.7 MeV of kinetic energy distributed among the three alpha particles. The extra energy comes from the conversion of mass to energy, as in Einstein’s famous equation.

    #13302
    Avatarmarkrh
    Participant

    Ivy Matt wrote: Proton-boron fusion begins to occur at an appreciable rate at about 100-150 keV ion energy. Optimum energies for proton-boron fusion are about 100-600 keV. Each reaction produces a total of 8.7 MeV of kinetic energy distributed among the three alpha particles. The extra energy comes from the conversion of mass to energy, as in Einstein’s famous equation.

    (H1) 1.00794u + (B11) 11.0099u = 12.01784u
    3 * (He4) 4.002602u = 12.0078064
    12.01784u – 12.0078064u = 0.0100336u is converted to energy.

    #13304
    AvatarIvy Matt
    Participant

    Looks about right. And one atomic mass unit is equivalent to about 931.5 MeV of energy.

    #13307
    Avatarmarkrh
    Participant

    Thanks Matt. I wasn’t looking at binding energy as the source of mass. I learn something new every day.
    931.5 Mev * 0.0100336u = 9.346 Mev

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