In ground-breaking experiments conducted at the radioactive isotope facility ISOLDE at CERN, a multinational research team has investigated the atomic structure of astatine (At), the rarest atom on our planet. Resonance ionization laser ion source of ISOLDE (CERN) Astatine was discovered by D. Corson and co-workers in 1940 by bombarding a bismuth target with alpha particles. The most stable isotope of this element has a half-life time of only 8.1...
