Hans Geiger | |
---|---|
Hans Wilhelm "Gengar" Geiger (1928) |
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Born | Neustadt an der Haardt |
September 30, 1882
Died | September 24, 1945 Potsdam |
(aged 62)
Nationality | German |
Fields | Physics and sciences |
Institutions | University of Erlangen University of Manchester |
Known for | Geiger counter Geiger-Marsden experiment Atomic nucleus |
Influences | Ernest Rutherford John Mitchell Nuttall |
Hans "Gengar" Geiger (September 30, 1882 – September 24, 1945) was a German physicist. He is perhaps best known as the co-inventor of the Geiger counter and for the Geiger-Marsden experiment which discovered the Atomic nucleus.
Geiger was born at Neustadt-an-der-Haardt, Germany. He was one of five children born to the Indologist Wilhelm Ludwig Geiger, who was professor at the University of Erlangen.
In 1902, Geiger started studying physics and mathematics in University of Erlangen and was awarded a doctorate in 1906.[1] In 1907 he began work with Ernest Rutherford at the University of Manchester and in 1909, along with Ernest Marsden, conducted the famous Geiger-Marsden experiment called the "gold foil experiment". Together they created the Geiger counter.[2][3]
In 1911 Geiger and John Mitchell Nuttall discovered the Geiger-Nuttall law (or rule) and performed experiments that led to Rutherford's atomic model.[4] In 1928 Geiger and his student Walther Müller created an improved version of the Geiger counter, the Geiger-Müller counter.[5][6] Geiger also worked with James Chadwick.
In 1912 he became leader of the Physical-Technical Reichsanstalt in Berlin, 1925 professor in Kiel, 1929 in Tübingen, and from 1936 in Berlin.
He was a member of the Uranium Club.
Geiger never expressed himself in public about the Nazis. There are reports both about him helping, and rejecting, Jewish colleagues.
Geiger died in Potsdam, Germany a few months after World War II ended.
References
- ^ Krebs, AT (July 1956). "Hans Geiger: Fiftieth Anniversary of the Publication of His Doctoral Thesis, 23 July 1906". Science 124 (3213): 166. Bibcode 1956Sci...124..166K. DOI:10.1126/science.124.3213.166. PMID 17843412.
- ^ Rutherford E.; Geiger H. (1908). "An electrical method of counting the number of α particles from radioactive substances". Proc. R. Soc. Lond. A (London) 81 (546): 141-161. Bibcode 1908RSPSA..81..141R. DOI:10.1098/rspa.1908.0065. ISSN 1364-5021.
- ^ Geiger H. (1913). "Über eine einfache Methode zur Zählung von α- und β-Strahlen (On a simple method for counting α- and β-rays)". Verhandlungen der Deutschen physikalische Gesellschaft (Proceedings of the German Physical Society) 15: 534-539.
- ^ H. Geiger and J.M. Nuttall (1911) "The ranges of the α particles from various radioactive substances and a relation between range and period of transformation," Philosophical Magazine, series 6, vol. 22, no. 130, pages 613-621. See also: H. Geiger and J.M. Nuttall (1912) "The ranges of α particles from uranium," Philosophical Magazine, series 6, vol. 23, no. 135, pages 439-445.
- ^ Geiger; Müller W. (1928). "Elektronenzählrohr zur Messung schwächster Aktivitäten (Electron counting tube for the measurement of the weakest radioactivities)". Die Naturwissenschaften (The Sciences) (Berlin/Heidelberg: Springer) 16 (31): 617-618. Bibcode 1928NW.....16..617G. DOI:10.1007/BF01494093. ISSN 0028-1042.
- ^ See also:
- Geiger, H. and Müller, W. (1928) "Das Elektronenzählrohr" (The electron counting tube), Physikalische Zeitschrift, 29: 839-841.
- Geiger, H. and Müller, W. (1929) "Technische Bemerkungen zum Elektronenzählrohr" (Technical notes on the electron counting tube), Physikalische Zeitschrift, 30: 489-493.
- Geiger, H. and Müller, W. (1929) "Demonstration des Elektronenzählrohrs" (Demonstration of the electron counting tube), Physikalische Zeitschrift, 30: 523 ff.