As the war closed in the summer of 1945, both the UPTI and the LEMO returned to Kharkov (changed in spelling to Kharkiv), but remained fully separate organizations. Slutskin, then in his mid-60s, continued to head the LEMO as well as serving as a professor at Kharkiv State University. Earlier, in 1939, Slutskin had been elected as a Corresponding Member of the Academy of Sciences of Ukraine, and in 1948, his status was upgraded to Academician. Before he died in 1950, Slutskin gradually turned the LEMO leadership over to Truten and Usikov. In 1955, the LEMO became the Institute of Radio-Physics and Electronics (IRE), initially headed by Usikov.