Surprising charge-radius kink in the Sc isotopes at N=20

Abstract

Charge radii of neutron deficient 40Sc and 41Sc nuclei were determined using collinear laser spectroscopy. With the new data, the chain of Sc charge radii extends below the neutron magic number N=20 and shows a pronounced kink, generally taken as a signature of a shell closure, but one notably absent in the neighboring Ca, K and Ar isotopic chains. Theoretical models that explain the trend at N=20 for the Ca isotopes cannot reproduce this puzzling behavior.

References in corpus (21)

• Nuclear magic numbers: new features far from stability
• Coupled-cluster computations of atomic nuclei
• Thick-Restart Block Lanczos Method for Large-Scale Shell-Model Calculations
• Unexpectedly large charge radii of neutron-rich calcium isotopes
• Charge, neutron, and weak size of the atomic nucleus
• A nucleus-dependent valence-space approach to nuclear structure
• Non-Empirical Interactions for the Nuclear Shell Model: An Update
• Accurate bulk properties of nuclei from $A=2$ to $\infty$ from potentials with $\Delta$ isobars
• Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of $N=32$
• Converged ab initio calculations of heavy nuclei
• Ab initio multi-shell valence-space Hamiltonians and the island of inversion
• Charge radii of exotic neon and magnesium isotopes
• Nuclear charge densities in spherical and deformed nuclei: towards precise calculations of charge radii
• Charge radii in covariant density functional theory: a global view
• Isospin-breaking corrections to superallowed Fermi beta-decay in isospin- and angular-momentum-projected nuclear Density Functional Theory
• Systematics of E2 strength in the sd-shell with the valence-space in-medium similarity renormalization group
• Charge radii of ${}^{55,56}$Ni reveal a surprisingly similar behavior at $N=28$ in Ca and Ni isotopes
• Kinetic-beam-energy determination via collinear laser spectroscopy
• Isospin effects in N~Z nuclei in extended Density Functional Theory
• Proton-neutron pairing correlations in the self-conjugate nucleus ${}^{42}$Sc
• Ground State Magnetic Dipole Moment of ${}^{40}$Sc

Cited by in corpus (9)

• Improved description of nuclear charge radii: Global trends beyond $N=28$ shell closure
• Critical evaluation of reference charge radii and applications in mirror nuclei
• Potential signature of new magicity from universal aspects of nuclear charge radii
• Transition frequencies, isotope shifts, and hyperfine structure in $4s\to 4p$ transitions of Ti${}^{+}$ ions
• Ab initio study of the radii of oxygen isotopes
• Shell quenching in nuclear charge radii based on Monte Carlo dropout Bayesian neural network
• Implication of shell quenching in scandium isotopes around N=20
• Reduction in nuclear size and quadrupole deformation of high-spin isomers of 127,129In
• Implication of odd-even staggering in the charge radii of calcium isotopes