The Magic Is Gone for Neutron Number 32 (IMAGE) DOE/US Department of Energy Caption Measured potassium isotopes charge radii (squares connected by black lines) compared to predictions by coupled-cluster theory (blue and green lines) and density functional theory (red line). Blue circles show the kink in charge radius at number 28 but not Credit Image courtesy of Á. Koszorús Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.