Nuclear magnetic resonance on orientedIr ( T=19.4 h) in Fe and Ni.

The hyperfine interaction ofIr ( j=1; T=19.4 h) in Fe and Ni has been investigated with the technique of nuclear magnetic resonance on oriented nuclei. For both systems the electronic-orbital-momentum induced electric quadrupole splitting could be resolved. The magnetic and electric hyperfine splitting frequencies, v =¦ gμ/h¦ and v= e qQ/h, respectively, were measured as:Ir Fe: v =408.54 (23) MHz; v=−2.47(20) MHz;Ir Ni: v=135.24(5) MHz; v=−1.23 (3) MHz. Taking into account a 3% uncertainty arising from hyperfine anomalies the g-factor is deduced as ¦ g¦=0.39 (1). The electric quadrupole moment, Q=+0.352 (18)b, is slightly smaller than expected from the known systematics of deformation parameters in this mass region. [ABSTRACT FROM AUTHOR]