Otto Robert Frisch was an Austrian-born British physicist who worked on nuclear physics. With Otto Stern and Immanuel Estermann he first measured the magnetic moment of the proton. With Lise Meitner he advanced the first theoretical explanation of nuclear fission and first experimentally detected the fission by-products. Later, with his collaborator Rudolf Peierls he designed the first theoretical mechanism for the detonation of an atomic bomb in 1940.

Immanuel Estermann was a Jewish German-born nuclear physicist and was professor at Carnegie Mellon University, University of Hamburg and Technion. Estermann is known for his lifelong collaboration with Otto Stern which pioneered the research on molecular beams in the 1920s. With Stern and Otto Robert Frisch, he also first measured the magnetic moment of the proton.