This article reports on the ground-state spin and momentsmeasured in 72,74Cu using collinear laser spectroscopy at the CERN On-Line Isotope Mass Separator (ISOLDE) facility. From the measured hyperfine coefficients, the nuclear observables μ (72Cu) = -1.3472(10)μN, μ(74Cu) =- 1.068(3) μN, Q(72Cu) = +8(2) efm2, Q(74Cu) = +26(3) efm2, I (72Cu) = 2, and I (74Cu) = 2 have been determined. Through a comparison of the measured magnetic moments with different models, the negative moment reveals a strong πf5/2 ⊗ νg9/2 component in the ground-state wave function. Consequently, a negative parity has been assigned to the ground states of 72,74Cu. Large-scale shell-model calculations illustrate the strong sensitivity of the nuclear moments to configuration mixing and to the effective interaction employed.
ASJC Scopus subject areas
- Nuclear and High Energy Physics