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Gamow

Definitions

  • WordNet 3.6
    • n Gamow United States physicist (born in Russia) who was a proponent of the big-bang theory and who did research in radioactivity and suggested the triplet code for DNA (1904-1968)
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Usage


In science:

Occasionally a relatively large resonance energy is sampled that is located close to the Gamow peak.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
Here the resonance is located just outside the energy region, E0 ± ∆/2 = 228 ± 72 keV, of the Gamow peak. A trend is clearly visible: the closer the sampled resonance energy to the Gamow peak maximum, E0, the larger the resulting rate.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
Most energy samples occur outside the Gamow peak, near the mean resonance energy, where the rate is relatively small.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
In parts (b) and (d) the horizontal dashed line indicates the mean value of the direct capture rate contribution, while the label “G.P.” refers to the location of the Gamow peak.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
The relative insensitivity of the reaction rate to energy variations if a resonance is located near the middle of the Gamow peak was already pointed out in Refs. [130,231].
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
V by the Gamow factor (Sec. 2.1 of Paper I), then the reaction rate becomes proportional to e−Er /kT −2πη (that is, the Gamow peak).
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
This method yields significantly different results at elevated temperatures compared to those commonly obtained by applying the Gamow peak concept.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
Consequently, in such situations a Gamow peak does not exist at all.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
Oppenheimer and Snyder.29 Gamow and Schoenberg30 identified the fundamental role of the neutrino and antineutrino emission in order to dissipate the enormous thermal energy developed in the early phases of gravitational collapse.
Fundamental physics from black holes, neutron stars and gamma-ray bursts
In particular, in the dominant N -to-∆-transition axial current, the N -to-∆ axial coupling constant (g ∗ A ) is retained as a parameter and is determined by fitting the experimental Gamow-Teller matrix element of tritium β -decay (GTEXP ).
Muon Capture on Deuteron and 3He: A Personal Review
A /fV is the ratio of statistical rate functions for axial/vector currents and ρ = CAMGT /CV MV is the ratio of Gamow-Teller to Fermi strengths for the decay.
V_ud and V_us: CKM 2010 working group I summary
Since the axial vector current is not conserved, in the case of the Gamow-Teller amplitude the Current Algebra analysis of the EWC does not lead to a simple expression, independent of the S.I., in contrast with the corrections involving the vector current (cf.
Radiative Corrections in Precision Electroweak Physics: a Historical Perspective
An interesting point is that the correction 1 + (α/2π)g (E, Em ) (Sirlin, 1967a) and the short distance contribution 1 + 2(α/π) ln(MZ /mp ) (Sirlin, 1982) affect both the Fermi and Gamow-Teller transitions, so they are well described by the factorization of the EWC in Eq.(93).
Radiative Corrections in Precision Electroweak Physics: a Historical Perspective
The ββ 2ν process involves only Gamow-Teller transitions through intermediate 1+ states only because of low momentum transfer.
Review of double beta experiments
Therefore the ββ 0ν process involves all the J+ intermediate states and it is evaluated at two pointlike Fermi vertices containing a Fermi and a Gamow-Teller part.
Review of double beta experiments
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