Abstract
The ground-state spins and magnetic moments of have been measured using bunched-beam high-resolution collinear laser spectroscopy at ISOLDE CERN. For a ground-state spin was firmly established. The observed hyperfine structure of requires a spin and strongly suggests . From its magnetic moment a spin-parity with a dominant hole configuration was deduced. This establishes for the first time the reinversion of the single-particle levels and illustrates the prominent role of the residual monopole interaction for single-particle levels and shell evolution.
- Received 14 February 2013
DOI:https://doi.org/10.1103/PhysRevLett.110.172503
© 2013 American Physical Society