The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
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shielded proton magnetic moment to nuclear magneton ratio
 $\mu^\prime_{\rm p}/\mu_{\rm N}$
 Numerical value  2.792 775 648
 Standard uncertainty  0.000 000 011
  Relative standard uncertainty  4.1 x 10-9
 Concise form  2.792 775 648(11)    
 
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 
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