March 1, 1998
      
                  
        
  Author(s)
  I  Tupitsyn,   Svetlana A. Kotochigova
 
       
            
    
    
        The contact term A c of magnetic hyperfine parameters as a function of internuclear distance R was computed, using the all-electron Valence-Bond method, Hartzee-Fock atomic basis set and configuration-interaction wave functions. Parameters were calculated