Eur. Phys. J. Special Topics 150, 145-146 (2007)
https://doi.org/10.1140/epjst/e2007-00289-1

Nuclear magnetic moment of ⁵⁷Cu ground state

¹ National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI, 48824, USA
² Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
³ Department of Physics, Michigan State University, East Lansing, MI, 48824, USA
⁴ Department of Physics, Weizmann Institute, 76100 Rehovot, Israel
⁵ Department of Physics, Westmont College, Santa Barbara, CA, 93108, USA

Received: 31 January 2007
Published online: 8 December 2007

Abstract

The nuclear magnetic moment of the ground state of ⁵⁷Cu(I^π = 3/2^-, T_1/2 = 196.3 ms) has been measured to be |μ(⁵⁷Cu)| = (2.00 ±0.05) μ_N using the β-NMR technique. Together with the known magnetic moment of the mirror partner ⁵⁷Ni, the spin expectation value was extracted as = -0.78 ± 0.13. Discrepancy between present results and shell model calculations in the full fp shell implies significant shell breaking at ⁵⁶Ni with the neutron number N = 28.