Extended Data Fig. 2: Absolute charge radii and the Fayans density functional calculations for 36−52K.
From: Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of N = 32

Charge radii along the chain of potassium isotopes from spherical as well as deformed calculations with the functional Fy(Δr,HFB) are compared to experimental data. The predictions of these two calculations are in excellent agreement with each other. Error bars show the statistical uncertainty, which in most of the cases are too small to be seen. The gray band corresponds to the systematic uncertainly of the experimental data due to the atomic parameters.