A294666 Decimal expansion of the hyperfine transition of neutral hydrogen in Hertz.

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

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. IM-19, No. 4 (1970), pp. 200-209.

Wikipedia, Hydrogen line

Wikipedia, Primeval Structure Telescope

Formula

Equals E * A081823 / A003676, where E is the energy (in eV) emitted after spin-flip 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