r_d · deuteron rms charge radius

중양성자 전하 반지름(제곱평균제곱근)

Takeaway

The relative standard uncertainty fell by a factor of about 10 from the 2002 to the 2022 edition (1.3×10⁻³ → 1.3×10⁻⁴): the error bars narrowed that much.
Of 5 earlier editions with a measured value, 4 have the 2022 value outside ±1σ (the error bar) and 4 outside ±2σ (the bar doubled); the normal expectation is about 1 in 3 and 1 in 22.
The largest move between editions came in 2014→2018, at 5.1 times the combined standard uncertainty of the two editions (|z| = 5.1).

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
2002	2.1394(28) e-15	2.8×10⁻¹⁸	1.3×10⁻³		−4.1500	2002 ASCII:78
2006	2.1402(28) e-15	2.8×10⁻¹⁸	1.3×10⁻³	0.2020	−4.4357	2006 ASCII:79
2010	2.1424 e-15	2.1×10⁻¹⁸	9.8×10⁻⁴	0.6286	−6.9619	2010 ASCII:86
2014	2.1413 e-15	2.5×10⁻¹⁸	1.2×10⁻³	−0.3369	−5.4080	2014 ASCII:86
2018	2.127 99 e-15	7.4×10⁻¹⁹	3.5×10⁻⁴	−5.1051	−0.2838	2018 ASCII:94
2022	2.127 78 e-15	2.7×10⁻¹⁹	1.3×10⁻⁴	−0.2666		2022 ASCII:95