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We report the first confirmation of the predicted inversion between the Pi2p(3/2) and Pi1f(5/2) nuclear states in the ?g(9/2) midshell. This was achieved at the ISOLDE facility, by using a combination of in-source laser spectroscopy and collinear laser spectroscopy on the ground states of {71,73,75}Cu, which measured the nuclear spin and magnetic moments. The obtained values are mu({71}Cu)=+2.2747(8)mu(N), mu({73}Cu)=+1.7426(8)mu(N), and mu({75}Cu)=+1.0062(13)mu(N) corresponding to spins I=3/2 for {71,73}Cu and I=5/2 for {75}Cu. The results are in fair agreement with large-scale shell-model calculations.

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Authors: FLANAGAN K T et al, Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, Leuven (BE)
Bibliographic Reference: An article published in: Physical Review Letters, Issue 103, October 2009
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