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${{\mathit n}}$ MASS (atomic mass units u)

INSPIRE   PDGID:

S017AMU

The mass is known much more precisely in u (atomic mass units) than in MeV. See the next data block.

VALUE (u) DOCUMENT ID TECN  COMMENT $1.00866491595$ $\pm0.00000000049$ TIESINGA 2021 RVUE 2018 CODATA value • • We do not use the following data for averages, fits, limits, etc. • • $1.00866491588$ $\pm0.00000000049$ MOHR 2016 RVUE 2014 CODATA value $1.00866491600$ $\pm0.00000000043$ MOHR 2012 RVUE 2010 CODATA value $1.00866491597$ $\pm0.00000000043$ MOHR 2008 RVUE 2006 CODATA value $1.00866491560$ $\pm0.00000000055$ MOHR 2005 RVUE 2002 CODATA value $1.00866491578$ $\pm0.00000000055$ MOHR 1999 RVUE 1998 CODATA value $1.008665904$ $\pm0.000000014$ COHEN 1987 RVUE 1986 CODATA value

References:

TIESINGA 2021 RMP 93 025010 CODATA recommended values of the fundamental physical constants: 2018 MOHR 2016 RMP 88 035009 CODATA Recommended Values of the Fundamental Physical Constants: 2014 MOHR 2012 RMP 84 1527 CODATA Recommended Values of the Fundamental Physical Constants: 2010 MOHR 2008 RMP 80 633 CODATA Recomended Values of the Fundamental Physical Constants: 2006 MOHR 2005 RMP 77 1 NIST Constants MOHR 1999 JPCRD 28 1713 CODATA Recommended Values of the Fundamental Physical Constants: 1998; Also RMP 72 351 CODATA Recommended Values of the Fundamental Physical Constants: 1998 COHEN 1987 RMP 59 1121 CODATA Fundamental Physical Constants 1986 Adjustments