During World War II, Schintlmeister, Dozent für Experimentalphysik (Docent for Experimental Physics), worked at the II.
In work completed in June 1940 and published in 1941, Schintlmeister had followed a line of reasoning similar to that of Carl Friedrich von Weizsäcker and Fritz Houtermans and had predicted the existence of the 94th element, plutonium.