The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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shielding difference of d and p in HD
 $\sigma_{\rm dp}$
 Numerical value  2.0200 x 10-8
 Standard uncertainty  0.0020 x 10-8
  Relative standard uncertainty  9.9 x 10-4
 Concise form  2.0200(20) x 10-8    
 
Click here for correlation coefficient of this constant with other constants
Source: 2018 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 
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