

A294666


Decimal expansion of the hyperfine transition of neutral hydrogen in Hertz.


0



1, 4, 2, 0, 4, 0, 5, 7, 5, 1, 7, 6
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OFFSET

10,2


REFERENCES

Ludwig Bergmann, Clemens Schaefer (edited by Wilhelm Raith), Constituents of Matter: Atoms, Molecules, Nuclei, and Particles, Walter de Gruyter & Co., Berlin, 1997, p. 203.


LINKS

Table of n, a(n) for n=10..21.
IEEE Transactions on Instrumentation and Measurement, Measurement of the Unperturbed Hydrogen Hyperfine Transition Frequency, vol. IM19, No. 4 (1970), pp. 200209.
Wikipedia, Hydrogen line
Wikipedia, Primeval Structure Telescope


FORMULA

Equals E * A081823 / A003676, where E is the energy (in eV) emitted after spinflip transition of atomic hydrogen in its ground electronic state.


EXAMPLE

1420405751.7667 + 0.0009 Hz.


CROSSREFS

Sequence in context: A182501 A048819 A076114 * A051478 A121829 A021708
Adjacent sequences: A294663 A294664 A294665 * A294667 A294668 A294669


KEYWORD

nonn,cons,less


AUTHOR

Arkadiusz Wesolowski, Nov 06 2017


STATUS

approved



