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

The mass is known much more precisely in u (atomic mass units) than in MeV. See the next data block.
S017AMU
VALUE (u) DOCUMENT ID TECN  COMMENT
$1.00866491606$ $\pm0.00000000040$
MOHR
2025
RVUE 2022 CODATA value
• • • We do not use the following data for averages, fits, limits, etc. • • •
$1.00866491595$ $\pm0.00000000049$
TIESINGA
2021
RVUE 2018 CODATA value
$1.00866491588$ $\pm0.00000000049$
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:
MOHR 2025
RMP 97 025002 CODATA Recommended Values of the Fundamental Physical Constants: 2022
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