Then from 1984 he spent the last year before he officially retired as a Fellow at the Argonne National Laboratory of the U.S. Department of Energy in Argonne, Illinois which carries out basic research and development of the peaceful uses of nuclear energy.
Pagkatapos siya mula sa 1,984 na nagastos sa huling taon bago siya opisyal na nagretiro bilang isang Fellow sa Argonne National Laboratory ng US Kagawaran ng Enerhiya sa Argonne, Illinois kung saan ang pangunahing nagdadala ng pananaliksik at pag-unlad ng mapayapa ay gumagamit ng nuclear energy.