Fritz Strassmann

Fritz Strassmann was a German chemist who, alongside Otto Hahn and Lise Meitner, played a pivotal role in the discovery of nuclear fission. His meticulous analytical chemistry work provided the crucial experimental evidence that a uranium nucleus could be split into lighter elements, a finding that fundamentally altered the course of physics and 20th-century history. For this achievement, he was posthumously honored with the Enrico Fermi Award and is remembered as a key figure in the development of nuclear science.

Early Life and Education

Born in Boppard on the Rhine, he developed an early interest in chemistry and mineralogy. He studied chemistry and physics at the Technical University of Hanover, where he was influenced by professors engaged in analytical chemistry and radiochemistry. After completing his doctorate in 1929, he worked briefly in the potash industry before his career path was dramatically altered by the economic turmoil of the Great Depression.

Career

In 1929, he joined the Kaiser Wilhelm Institute for Chemistry in Berlin-Dahlem, initially working under Hermann F. Mark on the adsorption of radon on surfaces. His expertise in precise radiochemical separation techniques soon brought him to the attention of Otto Hahn, who headed the institute's radiochemistry section. He became Hahn's indispensable assistant, forming a close working partnership with him and the theoretical physicist Lise Meitner. This collaboration, conducted under the increasing political pressure of the Nazi regime, would lead to their historic breakthrough. Following World War II, he helped rebuild German science, becoming a professor at the University of Mainz and serving as director of the Max Planck Institute for Chemistry there from 1946 until his retirement.

Discovery of Nuclear Fission

The critical experiments began in 1938, following the Anschluss and Meitner's forced emigration from Germany. He and Hahn continued bombarding uranium with neutrons, attempting to identify the resulting transuranium elements. Using extraordinarily precise analytical chemistry methods, he conclusively demonstrated that one product was barium, a much lighter element. This result, which contradicted all existing theories of nuclear physics, was communicated to Meitner in exile. She and her nephew Otto Robert Frisch provided the correct theoretical interpretation, coining the term "nuclear fission". Their joint paper, published in *Die Naturwissenschaften* in 1939, revolutionized the field. He and Hahn deliberately avoided any research into the military applications of their discovery during the subsequent World War II.

Personal Life

He was known for his modesty, integrity, and strong moral compass. In 1933, he refused to join the Nazi Party, a decision that limited his academic advancement. He married Maria Heckter in 1937, and the couple had one son. During the war, he and his wife provided shelter for a Jewish friend, Ilse Blumenthal, hiding her in their apartment in Berlin-Dahlem at great personal risk, an act later recognized by Yad Vashem. After the war, he was deeply committed to peaceful scientific research and the ethical responsibilities of scientists, themes he often addressed in public lectures.

Legacy

His legacy is firmly rooted in his essential contribution to one of the most significant scientific discoveries of the 20th century. Alongside Hahn, he received the Otto Hahn Prize in 1960 and the prestigious Enrico Fermi Award from the United States Atomic Energy Commission in 1966. The Max Planck Institute for Chemistry in Mainz established a lecture series in his honor. He is remembered not only as a brilliant analytical chemist but also as a man of profound conscience who resisted political tyranny and advocated for the peaceful use of atomic energy. His life and work stand as a testament to the critical role of meticulous experimentation in scientific discovery and the importance of scientific ethics.

Category:German chemists Category:Nuclear chemists Category:1902 births Category:1980 deaths