  Bruno Touschek was an Austrian born theoretical physicist, who proposed and
built the first electron-positron collider in 1960 in the Frascati National
Laboratories in Italy. In this note we reconstruct a crucial period of Bruno
Touschek's life so far scarcely explored, which runs from Summer 1945 to the
end of 1946. We shall describe his university studies in G\"ottingen, placing
them in the context of the reconstruction of German science after 1945. The
influence of Werner Heisenberg and other prominent German physicists will be
highlighted. In parallel, we shall show how the decisions of the Allied powers
towards restructuring science and technology in the UK after the war effort,
determined Touschek's move to the University of Glasgow in 1947.
