Hans Geiger

Johannes ( Hans ) Wilhelm Geiger (September 30, 1882 – September 24, 1945) was a German physicist.

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Together with Walther M?ller he developed the Geiger counter.

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Geiger was born at Neustadt-an-der-Haardt, Germany. He was one of five children born to Wilhelm Ludwig Geiger, a philosophy professor at the University of Erlangen.

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In 1902 Geiger began to study physics and mathematics in Erlangen and later attained a doctorate in 1906.

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In 1907 he began work with Ernest Rutherford at the University of Manchester. In 1912 he became leader of the Physical-Technical Reichsanstalt in Berlin, 1925 professor in Kiel, 1929 in T?bingen, and from 1936 in Berlin. While in Berlin he developed, together with the graduate student Walter M?ller, the Geiger counter.

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He discovered with John Mitchell Nuttall the Geiger-Nuttal law and performed experiments that lead to Rutherford's atomic model. He was also a member of the Uranverein (Uranium Club) in Nazi Germany, the group of German physicists who, during World War II, worked on but failed to create the German atomic bomb. (How much this failure resulted from lack of scientific progress and how much from foot-dragging due to ethical concerns remains a lively debate even today.)

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His loyalty to the Nazi Party led him to betray his Jewish colleagues, many of whom had helped him in his research before he became a member of the Nazi Party.

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Geiger died in Potsdam a few months after the war ended.

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September 30: September 30 is the 273rd day of the year (274th in leap years) in the Gregorian calendar, with 92 days remaining. It is the last day of September....

1882: 1882 was a common year starting on Sunday (see link for calendar)....

September 24: September 24 is the 267th day of the year (268th in leap years). There are 98 days remaining....

Hans Geiger related Images and Photos (experimental)

Portrait of Hans Holbein	Portrait of Hans Christian Andersen	Geiger Counter with Earphones Sensitive Enough to Detect Radioactivity of a Watch	Hans Holbein the Younger Engraved by Bartholomaus Huebner 1790
Portrait Miniature of Count Hans Axel Von Fersen (1755-1810)	The Artist at Work Painting Hans Sachs	The King Makes a Promise to Hans the Hedgehog	Apparatus For Healing Arm Fractures Feldtbuch Der Wundartzney Hans Von Gersdorff c.1540
Amputation Illustration from Feldtbuch Der Wundartzney by Hans Von Gersdorff c.1540	The Old Witch Combing Gerda's Hair in 'The Snow Queen' from Hans Christian Andersen's Fairy Tales	Edith Erastoff and Victor Sjöström: Berg-Ejvind Och Hans Hustru 1918	Meeting at the Field of the Cloth of Gold 7th June 1520 after Hans Holbein the Elder (1460/5-1524)