# The Oklo bound on the time variation of the fine-structure constant revisited

@article{Damour1996TheOB,
title={The Oklo bound on the time variation of the fine-structure constant revisited},
author={T. Damour and Freeman J. Dyson},
journal={Nuclear Physics},
year={1996},
volume={480},
pages={37-54}
}
• Published 28 June 1996
• Physics
• Nuclear Physics
253 Citations

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## References

SHOWING 1-10 OF 61 REFERENCES
Cosmological variability of fundamental physical constants
• Physics
• 1995
Gamow was one of the pioneers who studied the possible variability of fundamental physical constants. Some versions of modern Grand Unification theories do predict such variability. The paper is
On the origin of the light elements (Z<6)
The author reviews the status of our understanding of nucleosynthesis of the light nuclei ([ital Z][lt]6). The standard view today is that these elements are, for the most part, generated by two
Atomic clocks and variations of the fine structure constant.
• Physics
Physical review letters
• 1995
A new test for possible variations of the fine structure constant alpha is described by comparisons of rates between clocks based on hyperfine transitions in alkali atoms with different atomic number Z, which will yield the most sensitive of all tests for dot-alpha/alpha.
Physical Constants in Extra-Galactic Nebulæ
RECENT wave-length measurements by R. Minkowski and O. C. Wilson1 of spectral lines of H, N II, O I, O II, Ne III and Ne V for the colliding galaxies identified with the radio source Cygnus A permit
DOES THE FINE-STRUCTURE CONSTANT VARY WITH COSMIC TIME.
• Physics
• 1967
The fine structure constant at red shifts Δλ / λ≈0.2, corresponding to an epoch around two billion years ago, has been determined using the wavelengths of a pair of O III emission lines measured in
Astrophysical Limits on the Evolution of Dimensionless Physical Constants over Cosmological Time
• Physics
• 1995
We report new upper limits on any possible long-term time variation of the ratio of the electron to proton masses, $(m_e/m_p)$, the fine-structure constant, ($\alpha$), and the quantity \$\alpha^2
Direct test of the constancy of fundamental nuclear constants
THE possibility that fundamental nuclear constants may vary slowly while the Universe expands has been discussed by several authors1–5. I try here to show that the well known resonance properties of