Nuclear dipole moment of {sup 71}Cu from online {beta}-NMR measurements

On-line {beta}-NMR measurements on nuclei oriented at low temperatures of the magnetic dipole moment of {sup 71}Cu(N=42) are reported, with the result {mu}({sup 71}Cu)=+2.28(1) nuclear magneton (n.m.). The value shows a significant difference from {mu}({sup 67}Cu)=+2.54(2) n.m., revealing asymmetry with respect to N=40. This effect presents a challenge to theoretical interpretation.