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A005600 Decimal expansion of reciprocal of fine-structure constant alpha.
(Formerly M2606)
11
1, 3, 7, 0, 3, 5, 9, 9, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
3,2
COMMENTS
The fine-structure "constant" actually isn't a constant, it depends on the energy at which it is measured: Its value is known to approach 1/128 at interaction energies above 80 GeV. For other considerations, e.g., whether the value of the fine-structure constant differs by location and over time, see the Wikipedia article or other links. - M. F. Hasler, Oct 30 2013
REFERENCES
John Barrow, The Constants of Nature, 367 pp., Jonathan Cape, 2002.
K. R. Lang, Astrophysical Data: Planets and Stars, Springer-Verlag, NY, 1991.
Martin J. Rees, Just Six Numbers: the deep forces that shape the universe, Phoenix, 1999.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
E. R. Cohen and B. N. Taylor, The 1986 adjustment of the fundamental physical constants, Rev. Modern Phys., 59 (1987), 1121-1148.
Morel, L., Yao, Z., Cladé, P. et al. Determination of the fine-structure constant with an accuracy of 81 parts per trillion. Nature 588, 61-65 (2020). doi:10.1038/s41586-020-2964-7
FORMULA
1/alpha = 1/A003673.
1/alpha = c/V_n1 = A003678/A081800. - Omar E. Pol, Mar 11 2018
EXAMPLE
1/alpha = 137.035999206(11) [Morel et al., 2020]
CROSSREFS
Sequence in context: A127584 A124919 A033920 * A180873 A021031 A291835
KEYWORD
cons,nonn
AUTHOR
EXTENSIONS
Updated May 20 2003
Updated by Omar E. Pol, Aug 09 2009
Updated by Raphie Frank, Dec 13 2012
Updated by Arkadiusz Wesolowski, Feb 08 2016
Updated by Rémy Sigrist, Dec 05 2020
Dropped the digits that could change with 1 standard error variation of the value provided by CODATA - Andrey Zabolotskiy, Dec 12 2020
STATUS
approved

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Last modified March 19 06:29 EDT 2024. Contains 370953 sequences. (Running on oeis4.)