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

doi:10.1016/j.physletb.2014.02.012

arXiv · 1310.5171

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

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Abstract

We report on the measurement of optical isotope shifts for $^{38,39,42,44,46\text{-}51}$K relative to $^{47}$K 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 $^{37}$K to $^{51}$K, covering all $νf_{7/2}$-shell as well as all $νp_{3/2}$-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.

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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. 2013-10-18. Nuclear charge radii of potassium isotopes beyond N=28. https://doi.org/10.1016/j.physletb.2014.02.012

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