MOglichkeit neuer Elemente und ihre Bedeutung fUr die Astrophysik, Astronomische Nachrichten 253 (4). pp. 93–108, 1934 ALSO WRITTEN Möglichkeit neuer Elemente und ihre Bedeutung für die Astrophysik, Astronomische Nachrichten 253 (4). pp. 93–108, 1934
Kiel: Schaidt and Oheim, 1934. 1st Edition. FIRST EDITION, bound full volume, of Stjepan Mohorovicic's prediction of the existence of positronium. “Positronium (Ps) is a system consisting of an electron and its anti-particle, a positron, bound together into an exotic atom, specifically an onium. The system is unstable: the two..... More