The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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shielded helion magnetic moment to nuclear magneton ratio
 $ \mu_{\rm h}^\prime(^3{\rm He})/\mu_{\rm N} = \mu_{\rm h}^\prime(^3{\rm He})/(e\hbar/2m_{\rm p}) $
 Numerical value  -2.127 497 719
 Standard uncertainty   0.000 000 025
  Relative standard uncertainty  1.2 x 10-8
 Concise form  -2.127 497 719(25)    
 
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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