Paul O. Müller (born 18 April 1915 in Graz; died 9 March 1942 at Pechenkino near Sukhinichi) was an Austrian theoretical nuclear physicist who worked in the German Uranverein.
[2][3] After 1939, Müller and Karl-Heinz Höcker collaborated with Carl Friedrich von Weizsäcker at the Kaiser-Wilhelm Institut für Physik (KWIP, after World War II reorganized and renamed the Max Planck Institute for Physics), in Berlin-Dahlem, on the theory behind the Uranmaschine (uranium machine, i.e., nuclear reactor).
[2] Many at the KWIP and those working on the Uranmaschine had the classification of unabkömmlich (uk, indispensable) and were exempt from being drafted into armed service.
As the war raged on, the demand for men to provide armed service resulted in Höcker and Müller being drafted in late 1940 or early 1941.
The reports were confiscated under the Allied Operation Alsos and sent to the United States Atomic Energy Commission for evaluation.