e · elementary charge

기본 전하

Takeaway

The relative standard uncertainty fell by a factor of about 714 from the 1969 to the 2014 edition (4.4×10⁻⁶ → 6.1×10⁻⁹): the error bars narrowed that much.
Of 8 earlier editions with a measured value, 7 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 2022 value is exact.
The largest move between editions came in 1973→1986, at 2.6 times the combined standard uncertainty of the two editions (|z| = 2.6).
Exact from the 2018 edition (fixed by definition rather than measured), so its uncertainty is zero.

Unit: C
Note: √(2αh/μ₀c) before 2019. The 1998–2006 ASCII tables have no elementary-charge row; the row for the electron volt in joules carries the same number and is used instead.
M1: Half-life (years): 5.02 (4.25–6.15)

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	Exactfixed by definition, uncertainty zero	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	1.6021917(70) e-19	7.0×10⁻²⁵	4.4×10⁻⁶			−2.1523	477 table XXXII
1973	1.6021892(46) e-19	4.6×10⁻²⁵	2.9×10⁻⁶		−0.2985	−2.7317	718 table 33.1
1986	1.60217733(49) e-19	4.9×10⁻²⁶	3.1×10⁻⁷		−2.5659	−1.4204	codata86 p.8 table 2
1998	1.602 176 462(63) e-19	6.3×10⁻²⁷	3.9×10⁻⁸		−1.7570	2.7302	1998 ASCII:100
2002	1.602 176 53(14) e-19	1.4×10⁻²⁶	8.7×10⁻⁸		0.4429	0.7429	2002 ASCII:101
2006	1.602 176 487(40) e-19	4.0×10⁻²⁷	2.5×10⁻⁸		−0.2953	3.6750	2006 ASCII:102
2010	1.602 176 565 e-19	3.5×10⁻²⁷	2.2×10⁻⁸		1.4675	1.9714	2010 ASCII:123
2014	1.602 176 6208 e-19	9.8×10⁻²⁸	6.1×10⁻⁹		1.5352	1.3469	2014 ASCII:123
2018	1.602 176 634 e-19			yes			2018 ASCII:131
2022	1.602 176 634 e-19			yes			2022 ASCII:132