{"source":{"code":"CODATA","citation":"CODATA 1986: E.R. Cohen and B.N. Taylor, The 1986 Adjustment of the Fundamental Physical Constants, CODATA Bull., 1986, 63, 1.","srcurl":"https:\/\/doi.org\/10.6028\/jres.092.010","url":"https:\/\/goldbook.iupac.org\/source\/view\/0148","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","accessed":"2026-04-27T13:41:29+00:00","terms":{"A00497":{"term":"atomic mass constant","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.A00497"},"":{"term":null,"updated":null,"url":null},"B00692":{"term":"Bohr magneton","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.B00692"},"B00693":{"term":"Bohr radius","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.B00693"},"E02008":{"term":"electron rest mass","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.E02008"},"F02389":{"term":"fine structure constant, α","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.F02389"},"G02695":{"term":"gravitational constant","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.G02695"},"H02748":{"term":"Hartree energy","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.H02748"},"N04120":{"term":"neutron rest mass","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.N04120"},"N04236":{"term":"nuclear magneton","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.N04236"},"P04685":{"term":"Planck constant","updated":"2020-01-01","url":"https:\/\/doi.org\/10.1351\/goldbook.P04685"},"P04911":{"term":"proton magnetic moment","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.P04911"},"P04912":{"term":"proton magnetogyric ratio","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.P04912"},"P04914":{"term":"proton rest mass","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.P04914"},"R05051":{"term":"radiation constants","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.R05051"},"R05430":{"term":"Rydberg constant","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.R05430"},"S05442":{"term":"Sackur–Tetrode constant","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.S05442"},"S05854":{"term":"speed of light in a vacuum","updated":"2020-01-01","url":"https:\/\/doi.org\/10.1351\/goldbook.S05854"},"S05905":{"term":"standard acceleration of free fall","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.S05905"},"S05906":{"term":"standard atmosphere","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.S05906"},"S05964":{"term":"Stefan–Boltzmann constant","updated":"2014-02-24","url":"https:\/\/doi.org\/10.1351\/goldbook.S05964"}}}}