The Franck–Hertz experiment, conducted by Gustav Ludwig Hertz and James Franck in 1914, provided empirical evidence for the quantization of electron energy levels in atoms. This fundamental discovery shifted the trajectory of quantum physics, earning both scientists the Nobel Prize in Physics in 1925 for their work regarding the impact of electrons upon atoms.
Academic Foundation and Early Research
Born in 1887 in Hamburg, Hertz pursued physics at the University of Göttingen, Ludwig-Maximilians-Universität München, and Frederick William University Berlin, receiving his Ph.D. in 1911. By 1913, he held a research assistant position at the Friedrich William University of Berlin. His trajectory was interrupted by World War I, during which he served in the military and participated in gas-warfare research before returning to academia as a Privatdozent in 1917.
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Hertz transitioned to the private sector in 1920, joining Koninklijke Philips NV. In 1925, he accepted a position as Director of the Physics Institute at the University of Halle, later moving to lead the Physics Institute at the Technische Universität Berlin in 1928. During this period, he focused on gaseous diffusion techniques for isotope separation, a field that remained central to his research during his subsequent tenure at Siemens from 1935 to 1945.
The Soviet Years
In 1945, Hertz moved to the Soviet Union as part of a group of German scientists, including Manfred von Ardenne and Peter Adolf Thiessen, who coordinated their relocation to protect their research facilities. As head of Institute G in Agudseri, near Sokhumi, he led projects in isotope separation, mass spectrometry, and diffusion cascade stability for the Soviet nuclear program. His contributions were recognized with the Stalin Prize in 1951.
Final Decades in East Germany
Hertz returned to Germany in 1954, serving as Director of the Physics Institute at Leipzig University until his retirement in 1961. His academic influence continued through his leadership of the Physical Society of East Germany and his membership in numerous international bodies, including the Academy of Sciences of the USSR and the Hungarian Academy of Sciences. He died in 1975 in East Berlin and was buried at Ohlsdorf Cemetery.
Fast facts
- Born: 1887, Hamburg
- Died: 1975, East Berlin
- Education: University of Göttingen, Ludwig-Maximilians-Universität München, Frederick William University Berlin
- Nobel Prize: Physics, 1925
- Notable Work: Franck–Hertz experiment
- Primary Employers: Siemens, Leipzig University, Sokhumi Institute of Physics and Technology
- Awards: Stalin Prize, Max Planck Medal, Helmholtz Medal
- Burial: Ohlsdorf Cemetery
Questions readers ask
What was the significance of the Franck–Hertz experiment?
The experiment confirmed the quantization of energy in atoms, showing that electrons lose energy only in discrete amounts upon collision.
Why did Gustav Hertz relocate to the Soviet Union?
He moved in 1945 as part of an organized pact with colleagues to secure continued research opportunities and prevent the plunder of their scientific equipment.
Achievements
- Nobel Prize in Physics — 1925
- Patriotic Order of Merit in Gold
- Max Planck Medal — 1951
- Notable work: Franck–Hertz experiment
- Held posts at Humboldt-Universität zu Berlin, Koninklijke Philips NV and Leipzig University
- Educated at Frederick William University Berlin, Gelehrtenschule des Johanneums and Humboldt-Universität zu Berlin
- Fields of research: physics
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