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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

    Pycnonuclear fusion (Ancient Greek: πυκνός, romanized: pyknós, lit. 'dense, compact, thick') is a type of nuclear fusion reaction which occurs due to zero-point oscillations of nuclei around their equilibrium point bound in their crystal lattice.

  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

    [18] [19] [20] This work, in turn, evolved from his fundamental discovery of quantum tunneling as the mechanism of nuclear alpha decay, and his application of this theory to the inverse process to calculate rates of thermonuclear reaction. At first, Gamow believed that all the elements might be produced in the very high temperature and density ...

  6. Sommerfeld parameter - Wikipedia

    en.wikipedia.org/wiki/Sommerfeld_parameter

    The Sommerfeld parameter η, named after Arnold Sommerfeld, is a dimensionless quantity used in nuclear astrophysics in the calculation of reaction rates between two nuclei and also appears in the definition of the astrophysical S-factor. It is defined as [1]

  7. Beta decay transition - Wikipedia

    en.wikipedia.org/wiki/Beta_decay_transition

    The Gamow–Teller transition is a pseudovector transition, that is, the selection rules for beta decay caused by such a transition involve no parity change of the nuclear state. [2] The spin of the parent nucleus can either remain unchanged or change by ±1.

  8. Stocks in these 4 sectors are best positioned to rally into ...

    www.aol.com/stocks-4-sectors-best-positioned...

    UBS recommends tech, financials, industrials and utilities stocks going into 2025, citing continued AI growth and pro-business policies under Trump.

  9. S-factor - Wikipedia

    en.wikipedia.org/wiki/S-factor

    In nuclear physics, the astrophysical S-factor S(E) is a rescaling of a nuclear reaction's total cross section σ(E) to account for the Coulomb repulsion between the charged reactants. It determines the rates of nuclear fusion reactions that occur in the cores of stars .