μₚ/μ_N · proton magnetic moment to nuclear magneton ratio

양성자 자기 모멘트(핵 마그네톤 단위)

Takeaway

The relative standard uncertainty fell by a factor of about 20,732 from the 1969 to the 2022 edition (6.1×10⁻⁶ → 2.9×10⁻¹⁰): the error bars narrowed that much.
Of 9 earlier editions with a measured value, 2 have the 2022 value outside ±1σ (the error bar) and 1 outside ±2σ (the bar doubled); the normal expectation is about 1 in 3 and 1 in 22.
The largest move between editions came in 1969→1973, at 3.7 times the combined standard uncertainty of the two editions (|z| = 3.7).

Value ±1σ by edition2022

Relative deviation from the 2022 value (symmetric-log axis). Open circles: the error bar does not reach the 2022 value. Squares: exact.

Editionyear of the recommended values (data cut-off)	As printedexactly as in the source table; digits in parentheses are the standard uncertainty in the last digits	Standard uncertaintyhalf-width of the error bar (±1σ)	Relative standard uncertaintystandard uncertainty ÷ \|value\|: bar width relative to the value	z vs previous editionmove from the previous edition ÷ combined standard uncertainty of the two	z vs 2022(2022 value − this value) ÷ this edition's standard uncertainty	Source locationpage and table of the paper, or file and line of NIST's table
1969	2.792782(17)	1.7×10⁻⁵	6.1×10⁻⁶		3.8438	478 table XXXII
1973	2.7928456(11)	1.1×10⁻⁶	3.9×10⁻⁷	3.7334	1.5860	719 table 33.1
1986	2.792847386(63)	6.3×10⁻⁸	2.3×10⁻⁸	1.6210	−0.6567	codata86 p.10 table 2
1998	2.792 847 337(29)	2.9×10⁻⁸	1.0×10⁻⁸	−0.7065	0.2631	1998 ASCII:261
2002	2.792 847 351(28)	2.8×10⁻⁸	1.0×10⁻⁸	0.3473	−0.2275	2002 ASCII:264
2006	2.792 847 356(23)	2.3×10⁻⁸	8.2×10⁻⁹	0.1380	−0.4943	2006 ASCII:266
2010	2.792 847 356	2.3×10⁻⁸	8.2×10⁻⁹	0.0000	−0.4943	2010 ASCII:280
2014	2.792 847 3508	8.5×10⁻⁹	3.0×10⁻⁹	−0.2121	−0.7259	2014 ASCII:280
2018	2.792 847 344 63	8.2×10⁻¹⁰	2.9×10⁻¹⁰	−0.7225	0.0000	2018 ASCII:285
2022	2.792 847 344 63	8.2×10⁻¹⁰	2.9×10⁻¹⁰	0.0000		2022 ASCII:286