Nuclear charge radii of potassium isotopes beyond N = 28

K. Kreim, M. L. Bissell, J. Papuga, K. Blaum, M. De Rydt, R. F. Garcia Ruiz, S. Goriely, H. Heylen, M. Kowalska, R. Neugart, G. Neyens, W. Nörtershäuser, M. M. Rajabali, R. Sánchez Alarcón, H. H. Stroke, D. T. Yordanov

    Research output: Contribution to journalArticlepeer-review


    We report on the measurement of optical isotope shifts for 38,39,42,44,46-51K relative to 47K from which changes in the nuclear mean square charge radii across the N = 28 shell closure are deduced. The investigation was carried out by bunched-beam collinear laser spectroscopy at the CERN-ISOLDE radioactive ion-beam facility. Mean square charge radii are now known from 37K to 51K, covering all νf7/2-shell as well as all νp3/2-shell nuclei. These measurements, in conjunction with those of Ca, Cr, Mn and Fe, provide a first insight into the Z dependence of the evolution of nuclear size above the shell closure at N = 28.

    Original languageEnglish (US)
    Pages (from-to)97-102
    Number of pages6
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    StatePublished - Apr 4 2014


    • Collinear laser spectroscopy
    • Isotope shift
    • Nuclear charge radius
    • Potassium

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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