Ar(d) · deuteron relative atomic mass

중양성자의 상대 원자 질량

Takeaway

The relative standard uncertainty fell by a factor of about 1,600 from the 1986 to the 2022 edition (1.2×10⁻⁸ → 7.4×10⁻¹²): the error bars narrowed that much.
Of 7 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 2018→2022, at 4.7 times the combined standard uncertainty of the two editions (|z| = 4.7).

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
1986	2.013553214(24)	2.4×10⁻⁸	1.2×10⁻⁸		−0.0607	codata86 p.10 table 2
1998	2.013 553 212 71(35)	3.5×10⁻¹⁰	1.7×10⁻¹⁰	−0.0537	−0.4743	1998 ASCII:76
2002	2.013 553 212 70(35)	3.5×10⁻¹⁰	1.7×10⁻¹⁰	−0.0202	−0.4457	2002 ASCII:76
2006	2.013 553 212 724(78)	7.8×10⁻¹¹	3.9×10⁻¹¹	0.0669	−2.3077	2006 ASCII:77
2010	2.013 553 212 712	7.7×10⁻¹¹	3.8×10⁻¹¹	−0.1095	−2.1818	2010 ASCII:81
2014	2.013 553 212 745	4.0×10⁻¹¹	2.0×10⁻¹¹	0.3803	−5.0250	2014 ASCII:81
2018	2.013 553 212 745	4.0×10⁻¹¹	2.0×10⁻¹¹	0.0000	−5.0250	2018 ASCII:88
2022	2.013 553 212 544	1.5×10⁻¹¹	7.4×10⁻¹²	−4.7051		2022 ASCII:89