Abstract
Nuclear magnetic resonance measurements have been performed for 184IrFe and 185IrNi at low temperatures of 7 and 16 mK. The quadrupole splitting could be resolved for the 185IrNi sample but not for the 184IrFe sample. The analysis of the 184IrFe data was done using the known quadrupole moment. With the hyperfine field of BIIF(IrFe)=-1373(7) kG and BIIF(IrNi)=-454.7(23) kG and the electric field gradient of eq(IrFe)=-0.283(6)*1017 V cm-2 and eq(IrNr)=-0.151(4)*1017 V cm-2, the magnetic moment of 184,185Ir and the quadrupole moment of 185Ir were deduced: mod mu (184Ir, 5) mod =0.696(5) mu N, mod mu (185Ir, 5/2-) mod =2.605(13) mu N and Q(185Ir, 5/2-)=-2.06(14) b. The properties of 185Ir could be explained in terms of an effective decoupling parameter and the (5/2-)(1/2)(541) Nilsson configuration.
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