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  2. Decay heat - Wikipedia

    en.wikipedia.org/wiki/Decay_heat

    Decay heat is the heat released as a result of radioactive decay. This heat is produced as an effect of radiation on materials: the energy of the alpha, beta or gamma radiation is converted into the thermal movement of atoms. Decay heat occurs naturally from decay of long-lived radioisotopes that are primordially present from the Earth's formation.

  3. Decay theory - Wikipedia

    en.wikipedia.org/wiki/Decay_theory

    The decay theory proposed by Thorndike was heavily criticized by McGeoch and his interference theory. [5] This led to the abandoning of the decay theory, until the late 1950s when studies by John Brown and the Petersons showed evidence of time based decay by filling the retention period by counting backwards in threes from a given number.

  4. Decay energy - Wikipedia

    en.wikipedia.org/wiki/Decay_energy

    The decay energy is the mass difference Δm between the parent and the daughter atom and particles. It is equal to the energy of radiation E . If A is the radioactive activity , i.e. the number of transforming atoms per time, M the molar mass, then the radiation power P is:

  5. Particle decay - Wikipedia

    en.wikipedia.org/wiki/Particle_decay

    In particle physics, particle decay is the spontaneous process of one unstable subatomic particle transforming into multiple other particles. The particles created in this process (the final state ) must each be less massive than the original, although the total mass of the system must be conserved.

  6. Exponential decay - Wikipedia

    en.wikipedia.org/wiki/Exponential_decay

    Heat transfer: If an object at one temperature is exposed to a medium of another temperature, the temperature difference between the object and the medium follows exponential decay (in the limit of slow processes; equivalent to "good" heat conduction inside the object, so that its temperature remains relatively uniform through its volume).

  7. Q value (nuclear science) - Wikipedia

    en.wikipedia.org/wiki/Q_value_(nuclear_science)

    Exothermic chemical reactions tend to be more spontaneous and can emit light or heat, resulting in runaway feedback(i.e. explosions). Q values are also featured in particle physics. For example, Sargent's rule states that weak reaction rates are proportional to Q 5. The Q value is the kinetic energy released in the decay at

  8. Earth's internal heat budget - Wikipedia

    en.wikipedia.org/wiki/Earth's_internal_heat_budget

    The flow of heat from Earth's interior to the surface is estimated at 47±2 terawatts (TW) [1] and comes from two main sources in roughly equal amounts: the radiogenic heat produced by the radioactive decay of isotopes in the mantle and crust, and the primordial heat left over from the formation of Earth. [2]

  9. Decay - Wikipedia

    en.wikipedia.org/wiki/Decay

    Decay theory, in psychology and memory; Social decay (decadence), in sociology; Urban decay, in sociology; Entertainment. Network decay (channel drift), in television ...