New Observations from the Hyperfine Structure of 49,51K

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Presentation transcript:

New Observations from the Hyperfine Structure of 49,51K Andrew Miller

“Reinversion” of levels Collinear Laser Spectroscopy at ISOLDE CERN 49,51K: Z=19, N=30,32 (beyond N=28) Measuring the ground state shows a “reinversion” of the π2s1/2 and π1d3/2 levels and gives us further constraints on our understanding of the nuclear shell model!

Collinear Laser Spectroscopy Collinear laser spectroscopy setup (COLLAPS) at ISOLDE. 1) Single charged ions; 2) laser beam; 3) electrostatic deflection plates; 4) post-acceleration electrodes; 5) charge exchange cell (CEC); 6) photomultiplier tubes; 7) brewster window.

Hyperfine Spectra

References Spins and Magnetic Moments of 49K and 51K: Establishing the ½+ and 3/2+ Level Ordering Beyond N = 28. J.Papuga et al. PRL 110, 172503 (2013). An ion cooler-buncher for high-sensitivity collinear laser spectroscopy at ISOLDE. E. Mané et al. Eur. Phys. J. A 42, 503-507 (2009). Nuclear charge radii of potassium isotopes beyond N = 28. K. Kreim et. al. PLB 731, 97-102 (2014).