Minamisono K, Mantica PF, Mertzimekis TJ, Davies AD, Hass M, Pereira J, Pinter JS, Rogers WF, Stoker JB, Tomlin BE, Weerasiri RR. Nuclear magnetic moment of the 57Cu ground state.
PHYSICAL REVIEW LETTERS 2006;
96:102501. [PMID:
16605727 DOI:
10.1103/physrevlett.96.102501]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Indexed: 05/08/2023]
Abstract
The nuclear magnetic moment of the ground state of (57)Cu(Iota(pi) = 3/2(-), T(1/2) = 196.3 ms) has been measured to be /mu((57)Cu)/ = (2.00 +/- 0.05)mu(N) using the beta-NMR technique. Together with the known magnetic moment of the mirror partner (57)Ni, the spin expectation value was extracted as <Sigmasigma(z)> = -0.078 +/- 0.13. This is the heaviest isospin mirror T = 1/2 pair above the (40)Ca region for which both ground state magnetic moments have been determined. The discrepancy between the present results and shell-model calculations in the full f p shell giving mu((57)Cu) approximately 2.4mu(N) and <Sigmasigma(z)> approximately 0.5 implies significant shell breaking at (56)Ni with the neutron number N = 28.
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