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  2. Gamow factor - Wikipedia

    en.wikipedia.org/wiki/Gamow_factor

    Gamow [3] first solved the one-dimensional case of quantum tunneling using the WKB approximation.Considering a wave function of a particle of mass m, we take area 1 to be where a wave is emitted, area 2 the potential barrier which has height V and width l (at < <), and area 3 its other side, where the wave is arriving, partly transmitted and partly reflected.

  3. Pycnonuclear fusion - Wikipedia

    en.wikipedia.org/wiki/Pycnonuclear_fusion

    Extrapolating this to the entire lattice allowed them to arrive at their formula for the rate of pycnonuclear fusion: [10] = where is the density of the plasma, is the mean molecular weight per electron (atomic nucleus), is a constant equal to and serves as a conversion factor from atomic mass units to grams, and represents the thermal average ...

  4. Stellar nucleosynthesis - Wikipedia

    en.wikipedia.org/wiki/Stellar_nucleosynthesis

    The reaction rate density between species A and B, having number densities n A,B, is given by: = where k is the reaction rate constant of each single elementary binary reaction composing the nuclear fusion process: = here, σ(v) is the cross-section at relative velocity v, and averaging is performed over all velocities.

  5. George Gamow - Wikipedia

    en.wikipedia.org/wiki/George_Gamow

    George Gamow (sometimes Gammoff; born Georgiy Antonovich Gamov; Russian: Георгий Антонович Гамов; 4 March 1904 – 19 August 1968) was a Soviet and American polymath, theoretical physicist and cosmologist.

  6. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Wastewater quality indicators are laboratory test methodologies to assess suitability of wastewater for disposal, treatment or reuse. The main parameters in sewage that are measured to assess the sewage strength or quality as well as treatment options include: solids, indicators of organic matter, nitrogen, phosphorus, indicators of fecal ...

  7. Freshwater environmental quality parameters - Wikipedia

    en.wikipedia.org/wiki/Freshwater_environmental...

    Freshwater environmental quality parameters are those chemical, physical and biological parameters that can be used to characterise a freshwater body. Because almost all water bodies are dynamic in their composition, the relevant quality parameters are typically expressed as a range of expected concentrations.

  8. Beta decay transition - Wikipedia

    en.wikipedia.org/wiki/Beta_decay_transition

    A calculation of the β emission decay rate is quite different from a calculation of α decay. In α decay the nucleons of the original nucleus are used to form the final state α particle (4 He). In β decay the β and neutrino particles are the result of a nucleon transformation into its isospin complement (n → p or p → n). Below is a ...

  9. Environmental monitoring - Wikipedia

    en.wikipedia.org/wiki/Environmental_monitoring

    Environmental monitoring is the processes and activities that are done to characterize and describe the state of the environment. It is used in the preparation of environmental impact assessments, and in many circumstances in which human activities may cause harmful effects on the natural environment.

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