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  2. Neutron transport - Wikipedia

    en.wikipedia.org/wiki/Neutron_transport

    Neutron transport is a type of radiative transport. ... In deterministic methods the transport equation (or an approximation of it, such as diffusion theory) ...

  3. Geometric and material buckling - Wikipedia

    en.wikipedia.org/wiki/Geometric_and_Material...

    Geometric buckling is a measure of neutron leakage and material buckling is a measure of the difference between neutron production and neutron absorption. [1] When nuclear fission occurs inside of a nuclear reactor, neutrons are produced. [1] These neutrons then, to state it simply, either react with the fuel in the reactor or escape from the ...

  4. Monte Carlo N-Particle Transport Code - Wikipedia

    en.wikipedia.org/wiki/Monte_Carlo_N-Particle...

    In 1947, John von Neumann sent a letter to Robert Richtmyer proposing the use of a statistical method to solve neutron diffusion and multiplication problems in fission devices. [5] His letter contained an 81-step pseudo code and was the first formulation of a Monte Carlo computation for an electronic computing machine.

  5. Neutron diffraction - Wikipedia

    en.wikipedia.org/wiki/Neutron_diffraction

    Neutron diffraction or elastic neutron scattering is the application of neutron scattering to the determination of the atomic and/or magnetic structure of a material. A sample to be examined is placed in a beam of thermal or cold neutrons to obtain a diffraction pattern that provides information of the structure of the material.

  6. List of named differential equations - Wikipedia

    en.wikipedia.org/wiki/List_of_named_differential...

    Kermack-McKendrick theory in infectious disease epidemiology; Kuramoto model in biological and chemical oscillations; Mackey-Glass equations; McKendrick–von Foerster equation in age structure modeling; Nernst–Planck equation in ion flux across biological membranes; Price equation in evolutionary biology; Reaction-diffusion equation in ...

  7. 'The next theory that will explain everything': LANL looks to ...

    www.aol.com/next-theory-explain-everything-lanl...

    Typically, a neutron on its own would be bouncing around too fast to be trapped and measured. To solve that problem, neutrons are cooled down, which makes the particle slow down to about 18 mph.

  8. Diffusion equation - Wikipedia

    en.wikipedia.org/wiki/Diffusion_equation

    The diffusion equation is a parabolic partial differential equation.In physics, it describes the macroscopic behavior of many micro-particles in Brownian motion, resulting from the random movements and collisions of the particles (see Fick's laws of diffusion).

  9. Jump diffusion - Wikipedia

    en.wikipedia.org/wiki/Jump_diffusion

    Jump diffusion can be studied on a microscopic scale by inelastic neutron scattering and by Mößbauer spectroscopy. Closed expressions for the autocorrelation function have been derived for several jump(-diffusion) models: Singwi, Sjölander 1960: [1] alternation between oscillatory motion and directed motion; Chudley, Elliott 1961: [2] jumps ...