Which pair of scientists made advancements in the study of nuclear fission?

The pair of scientists who made significant advancements in the study of nuclear fission is Hahn and Strassmann. They conducted pioneering experiments that led to the discovery of nuclear fission in 1938, when they found that bombarding uranium with neutrons resulted in the formation of barium, indicating the nucleus had split. This discovery laid the groundwork for understanding nuclear energy and reactions.

While Bohr and Wheeler contributed to the theoretical understanding of nuclear reactions, especially fission and its implications, Hahn and Strassmann are recognized for their experimental work that confirmed the phenomenon of fission. The other options either refer to scientists who were primarily involved in earlier atomic theory or unrelated areas of study, highlighting the focused contributions of Hahn and Strassmann to nuclear fission.