Constants Topics: Values Energy Equivalents Searchable Bibliography Background Constants Bibliography Constants, Units & Uncertainty home page	Articles on the 2022 Adjustment Detailed description of the 2022 adjustment, including the covariance matrix of selected constants: P. J. Mohr, D. B. Newell, and B. N. Taylor, and E. Tiesinga, J. Phys. Chem. Ref. Data 54, 033105 (2025) P. J. Mohr, D. B. Newell, and B. N. Taylor, and E. Tiesinga, Rev. Mod. Phys. 97, 025002 (2025)    Return to Latest (2022) values of the constants.