Nuclear Magnetic Moment of the 57Cu Ground State
  The nuclear magnetic moment of the ground state of 57Cu has been measured to be 2.00 +/- 0.05 nuclear magnetons (nm) using the beta-NMR technique. Together with the known magnetic moment of the mirror partner 57Ni, the spin extraction value was extracted as -0.78 +/- 0.13. This is the heaviest isospin T=1/2 mirror pair above the 40Ca region, for which both ground state magnetic moments have been determined. Shell model calculations in full fp shell giving mu(57Cu)~2.4 nm and <sigma_z> ~0.5 imply significant shell breaking at 56Ni with the neutron number N=28. 
K. Minamisono, P.F. Mantica, T.J. Mertzimekis, A.D. Davies, M. Hass,   J. Pereira, J.S. Pinter, W.F. Rogers, J.B. Stoker, B....