Szilard obtained permission from the head of the Physics Department at Columbia, George B. Pegram, to use a laboratory for three months, and persuaded Walter Zinn to become his collaborator.
Szilard obtained permission from the head of the Physics Department at Columbia, George B. Pegram, to use a laboratory for three months. He obtained a beryllium cylinder to provide a neutron source, and persuaded Walter Zinn to become his collaborator.