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Experimental determination of an Iπ=2- ground state in 72,74Cu

K.T. Flanagan 1 P. Vingerhoets M. L. Bissell K. Blaum B. A. Brown B. Cheal M. de Rydt D. H. Forest Ch. Geppert M. Honma M. Kowalska J. Krämer A. Krieger E. Mané R. Neugart G. Neyens W. Nörtershäuser M. Schug H. H. Stroke D. T. Yordanov
1 IPNO - Institut de Physique Nucléaire d'Orsay
Abstract : This article reports on the ground-state spin and moments measured 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.
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Submitted on : Monday, November 8, 2010 - 10:58:14 AM
Last modification on : Tuesday, December 1, 2020 - 6:42:04 PM

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K.T. Flanagan, P. Vingerhoets, M. L. Bissell, K. Blaum, B. A. Brown, et al.. Experimental determination of an Iπ=2- ground state in 72,74Cu. Physical Review C, American Physical Society, 2010, 82, pp.041302. ⟨10.1103/PhysRevC.82.041302⟩. ⟨in2p3-00533691⟩

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