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Hans Geiger

Hans Geiger . 1882-1945 Information presented by Kemone Moodley and Sam Orchison. Personal Story.

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Hans Geiger

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  1. Hans Geiger 1882-1945 Information presented byKemoneMoodley and Sam Orchison

  2. Personal Story Johannes Wilhelm Geiger was born on September 30 1882 Neustadt-an-der-Haardt, Germany. He was the son of Wilhelm Ludwig Geiger, a philosophy professor at the university of Erlangen and the eldest child of five children. • He studied at both the university of Munich and the university of Erlangen, majoring in in physics. • 1906-1912, worked with Rutherford, helped Rutherford • 1911, made the first version of the Geiger counter • 1914, left England to go back to Germany, served as a military officer in World War 1 • After World War 1 he went back to researching radioactivity from 1919-1945. • 1920 married Elisabeth Heffter whom he later had three kids with • 1928, while working in the University of Kiel, Geiger worked alongside physicist Walther Muller to improve Geiger counter. • I936, he along with 75 German physicists presented a paper to Hitler’s Education Ministry in protest of government interfering with science departments. • Continued to work at TechnischeHochschule. Forced to flee his city in 1945 during World War 2. • Died on September 24, 1945.

  3. Atom Idea • Through his experiments he assisted Rutherford in developing the theory that proposed that the nucleus of an atom occupies a very small volume.

  4. Experiments • This study of atom scattering was fundamental in inspiring Rutherford’s nuclear theory of the atom, made in 1912, that in any atom, the nucleus occupies a very small volume at the centre. • Conducted experiments based on Rutherford’s detection of the release of alpha particles from radioactive substances. • He created the Geiger counter which detects radioactivity. • Through the Geiger counter, Hans Geiger was able to detect alpha particles in the nucleus of a helium atom.

  5. Major Scientific Contribution 1911, in response to the experiments conducted on alpha particles, Geiger created an early version of the Geiger counter, a device that could count released alpha particles. 1925, alongside physicist Walther Muller, improved on the Geiger counter. This perfected version of the Geiger counter could locate a speeding alpha particle within about 1 cm in space and to within a hundred-millionth second. Counter was used to confirm existence of light quantum.

  6. Bibliography Websites: http://www.notablebiographies.com/Fi-Gi/Geiger-Hans.html http://web.mit.edu/invent/iow/geiger.html Books: 1. BcScience Chemistry 11

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