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Spins and Magnetic Moments of 49K and 51K: Establishing the 1/2+ and 3/2+ Level Ordering Beyond N=28

MPS-Authors

Kreim,  Kim
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Yordanov,  Deyan T.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

External Resource

http://link.aps.org/doi/10.1103/PhysRevLett.110.172503
(Publisher version)

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Citation

Papuga, J., Bissell, M., Kreim, K., Blaum, K., Brown, B., Rydt, M. D., et al. (2013). Spins and Magnetic Moments of 49K and 51K: Establishing the 1/2+ and 3/2+ Level Ordering Beyond N=28. Physical Review Letters, 110(17): 172503, pp. 1-5. doi:10.1103/PhysRevLett.110.172503.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-F861-6
Abstract
The ground-state spins and magnetic moments of 49,51K have been measured using bunched-beam high-resolution collinear laser spectroscopy at ISOLDE CERN. For 49K a ground-state spin I=1/2 was firmly established. The observed hyperfine structure of 51K requires a spin I>1/2 and strongly suggests I=3/2. From its magnetic moment μ(51K)=+0.5129(22)μN a spin-parity Iπ=3/2+ with a dominant π1d3/2-1 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.