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  2. Neutron activation - Wikipedia

    en.wikipedia.org/wiki/Neutron_activation

    Neutron activation is the process in which neutron radiation induces radioactivity in materials, and occurs when atomic nuclei capture free neutrons, becoming heavier and entering excited states. The excited nucleus decays immediately by emitting gamma rays , or particles such as beta particles , alpha particles , fission products , and ...

  3. Voltorb - Wikipedia

    en.wikipedia.org/wiki/Voltorb

    Voltorb (/ ˈ v ɔː l t ɔːr b / ⓘ), known in Japan as Biriridama (Japanese: ビリリダマ), is a Pokémon species in Nintendo and Game Freak's Pokémon media franchise.First introduced in the video games Pokémon Red and Blue, they were created by Ken Sugimori, appearing in the earliest design document for the game.

  4. Neutron detection - Wikipedia

    en.wikipedia.org/wiki/Neutron_detection

    Free neutrons decay by emission of an electron and an electron antineutrino to become a proton, a process known as beta decay: [2] n 0 → p + + e − + ν e. Although the p + and e − produced by neutron decay are detectable, the decay rate is too low to serve as the basis for a practical detector system.

  5. Neutron transport - Wikipedia

    en.wikipedia.org/wiki/Neutron_transport

    The number of neutrons produced per fission is multiplicatively modified by the dominant eigenvalue. The resulting value of this eigenvalue reflects the time dependence of the neutron density in a multiplying medium. k eff < 1, subcritical: the neutron density is decreasing as time passes; k eff = 1, critical: the neutron density remains ...

  6. Photodisintegration - Wikipedia

    en.wikipedia.org/wiki/Photodisintegration

    The incoming gamma ray effectively knocks one or more neutrons, protons, or an alpha particle out of the nucleus. [1] The reactions are called (γ,n), (γ,p), and (γ,α), respectively. Photodisintegration is endothermic (energy absorbing) for atomic nuclei lighter than iron and sometimes exothermic (energy releasing) for atomic nuclei heavier ...

  7. Even and odd atomic nuclei - Wikipedia

    en.wikipedia.org/wiki/Even_and_odd_atomic_nuclei

    The first four "odd–odd" nuclides occur in low mass nuclides, for which changing a proton to a neutron or vice versa would lead to a very lopsided proton–neutron ratio (2 1 H, 6 3 Li, 10 5 B, and 14 7 N; spins 1, 1, 3, 1). All four of these isotopes have the same number of protons and neutrons, and they all have an odd number for their ...

  8. Nuclear pasta - Wikipedia

    en.wikipedia.org/wiki/Nuclear_pasta

    The result is a compact ball of nearly pure neutron matter with sparse protons and electrons interspersed, filling a space several thousand times smaller than the progenitor star. [ 4 ] At the surface, the pressure is low enough that conventional nuclei, such as helium and iron , can exist independently of one another and are not crushed ...

  9. Radiation hardening - Wikipedia

    en.wikipedia.org/wiki/Radiation_hardening

    Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation (particle radiation and high-energy electromagnetic radiation), [1] especially for environments in outer space (especially beyond low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear ...