An overview of the mission and activities of the Nuclear Data Section of the International Atomic Energy Agency will be presented.
$\textbf{Historical overview}$. War and peace. The foundation of the International Atomic Energy Agency. Total neutron cross sections; $\textbf{matter radii}$; correlation with binding energy. Visit to Ioffe Institute: K$_\alpha$ Isotope Shift $\rightarrow$ $\delta r^2_{charge}$; other methods. Fine structure in $\textbf{charge radii}$ along isotopic series: shell effects, odd-even,...
Light nuclei exhibit many facets of nuclear structure, like halos and clustering, and are accessible for ab-initio nuclear structure calculations. The atomic structure of few-electron systems is well understood; it allows for accurate calculations of mass-shift and field-shift factors in non-relativistic quantum electrodynamics calculations (NR-QED) to extract precise nuclear charge radii...
The gyromagnetic $g$-factor of bound electrons in highly charged ions is ideal for testing quantum electrodynamics (QED) in the strongest electric fields. In heavy highly charged ions (HCI) the innermost electrons experiences electric fields exceeding $10^{15}$ V/cm that are otherwise unreachable in laboratories, but in a system still simple enough to enable high-precision theory...
