- Citation example:
- P.J. Mohr, B.N. Taylor, and D.B. Newell (2007),
"The 2006 CODATA Recommended Values of the Fundamental Physical
Constants" (Web Version 5.0).
This database was developed by J. Baker, M. Douma, and S. Kotochigova.
Available: http://physics.nist.gov/constants
[2008, September 15]. National Institute of Standards and
Technology, Gaithersburg, MD 20899.
|
|
Version 5.1
31 December 2007 |
A preprint of the paper "CODATA Recommended
Values of the Fundamental Physical Constants: 2006," by P.J. Mohr, B.N. Taylor,
and D.B. Newell, giving the details of the adjustment of the constants has been
added to the website. [1.2 MB PDF] |
Version 5.0
7 March 2007 |
Values updated to the 2006 CODATA recommended values.
The 2006 values replace the
previously recommended 2002 CODATA
values, which are available in archived tables. |
Version 4.2
24 May 2005 |
Various files were updated to reflect the publication date of the
Reviews of Modern Physics article. The correlation coefficients
have been updated to give better accuracy. The file of residuals
Y has been corrected.
|
Version 4.1
18 April 2005 |
Numerical data associated with the 2002 least-squares adjustment of the
values of the constants is provided in this version with enough significant
figures to be useful in related calculations. The notation is that given in
Reviews of Modern Physics 72, 351 (2000), Appendix E. The data is
from the CODATA 2002 least-squares adjustment described in
Reviews of Modern Physics 77 1 (2005). |
Version 4.0
9 December 2003 |
Values updated to the 2002 CODATA recommended values. A table of all
constants in ascii is available in this version. The 2002 values replace the
previously recommended 1998 CODATA
values, which are available in archived tables. |
Version 3.2
1 October 2003 |
The pages giving the conversion from hartree to joule and their correlation
coefficient were corrected to give the appropriate values of the standard and
relative standard uncertainties instead of the previously listed
"(exact)" statements. |
Version 3.1
3 December 1999 |
Various minor changes from Version 3.0 have been made, including the following.
The last digit of each of three values related to the Rydberg constant has been
changed by 1, the convention of giving values of properties of the negatively
charged muon and tau has been adopted, and the symbol for the molar mass
constant has been changed. Further details are
available. |
Version 3.0
23 July 1999 |
Values updated to the 1998 CODATA recommended values. Correlation coefficients
available between all constants. The 1998 values replace the previously
recommended 1986 CODATA values,
which are available in an archived document. |
Version 2.1
21 May 1998 |
Search algorithm improved to exclude prepositions. Links to selected scientific
data added.
NOTE:
Between July 6, 1998 and August 13, 1998, the search engine
inadvertently returned very preliminary working values intended for the next
CODATA set of recommended values. Since these were not the final values for
that update, they should be completely ignored. During that period, the
category tables provided the correct 1986 CODATA values. |
Version 2.0
17 February 1998 |
Entirely new interface, as part of the "NIST Reference on Constants, Units,
and Uncertainty." Search interface introduced. Values are available
individually in tables (from which users may copy the numbers), or by category
in both graphical and pdf formats. |
Version 1.3
1 October 1996 |
Most mathematical expressions have been converted from graphic images to html
notation for faster access. |
Version 1.2
11 September 1996 |
Postscript and Acrobat versions have been made available. |
Version 1.1
17 July 1996 |
Graphic images of the tables of constants have been improved. |
Version 1.0
6 October 1994 |
The 1986
recommended values are first made available on the internet. |
