JohannesJohannes
Wilhelm GeigerWilhelm Geiger
(Hans)(Hans)DOBDOB::
September 30, 1882September 30, 1882
DODDOD::
September...
BackgroundBackground
NationalityNationality::
GermanGerman
LifeLife::
 born at Neustadt-an-der-Haardt, Germanyborn at Neustadt-an-der-Haardt, Germany
 He was one of five childrenH...
EducationEducation::
 Geiger was educated first at Erlangen Gymnasium,Geiger was educated first at Erlangen Gymnasium,
fr...
ContributionsContributions ::
German physicist who introduced the first successful detector (the GeigerGerman physicist w...
AwardsAwards::
 Council of the Physical Society hasCouncil of the Physical Society has
this year awarded the fifteenththi...
Works CitedWorks Cited
 http://en.wikipedia.org/wiki/Hans_Geigerhttp://en.wikipedia.org/wiki/Hans_Geiger
 http://www.mid...
Student IDStudent ID
9422395294223952
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Johannes wilhelm geiger

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Johannes wilhelm geiger

  1. 1. JohannesJohannes Wilhelm GeigerWilhelm Geiger (Hans)(Hans)DOBDOB:: September 30, 1882September 30, 1882 DODDOD:: September 24, 1945September 24, 1945 Greatest AccomplishmentGreatest Accomplishment:: co-inventor of the Geiger counter andco-inventor of the Geiger counter and for the Geiger-Marsden experimentfor the Geiger-Marsden experiment which discovered the Atomic nucleus.which discovered the Atomic nucleus.
  2. 2. BackgroundBackground NationalityNationality:: GermanGerman
  3. 3. LifeLife::  born at Neustadt-an-der-Haardt, Germanyborn at Neustadt-an-der-Haardt, Germany  He was one of five childrenHe was one of five children  Father: Ideologist Wilhelm Ludwig Geiger, who was professor at theFather: Ideologist Wilhelm Ludwig Geiger, who was professor at the University of Erlangen. In 1902University of Erlangen. In 1902  Geiger started studying physics and mathematics in University of ErlangenGeiger started studying physics and mathematics in University of Erlangen and was awarded a doctorate in 1906. In 1907 he began work with Ernestand was awarded a doctorate in 1906. In 1907 he began work with Ernest Rutherford at the University of Manchester and in 1909, along with ErnestRutherford at the University of Manchester and in 1909, along with Ernest Marsden, conducted the famous Geiger-Marsden experiment called theMarsden, conducted the famous Geiger-Marsden experiment called the 'gold foil experiment'. Together they created the Geiger counter. In 1911'gold foil experiment'. Together they created the Geiger counter. In 1911 Geiger and John Mitchell Nuttall discovered the Geiger-Nuttall law (or rule)Geiger and John Mitchell Nuttall discovered the Geiger-Nuttall law (or rule) and performed experiments that led to Rutherford's atomic model. In 1928and performed experiments that led to Rutherford's atomic model. In 1928 Geiger and his student Walther Müller created an improved version of theGeiger and his student Walther Müller created an improved version of the Geiger counter, the Geiger-Müller counter. Geiger also worked with JamesGeiger counter, the Geiger-Müller counter. Geiger also worked with James Chadwick. In 1912 he became leader of the Physical-TechnicalChadwick. In 1912 he became leader of the Physical-Technical Reichsanstalt in Berlin, 1925 professor in Kiel, 1929 in Tübingen, and fromReichsanstalt in Berlin, 1925 professor in Kiel, 1929 in Tübingen, and from 1936 in Berlin. He was a member of the Uranium Club, which was working1936 in Berlin. He was a member of the Uranium Club, which was working on an atomic bomb for Nazi Germany.on an atomic bomb for Nazi Germany.  Geiger died in Potsdam, Germany a few months after World War II ended.Geiger died in Potsdam, Germany a few months after World War II ended.
  4. 4. EducationEducation::  Geiger was educated first at Erlangen Gymnasium,Geiger was educated first at Erlangen Gymnasium, from which he graduated in 1901. After completingfrom which he graduated in 1901. After completing his required military service, he studied physicshis required military service, he studied physics (the study of the relationship between matter and(the study of the relationship between matter and energy) at the University of Munich and at theenergy) at the University of Munich and at the University of Erlangen, receiving a doctorate fromUniversity of Erlangen, receiving a doctorate from Erlangen in 1906 for his study of electrical releasesErlangen in 1906 for his study of electrical releases through gases.through gases.
  5. 5. ContributionsContributions :: German physicist who introduced the first successful detector (the GeigerGerman physicist who introduced the first successful detector (the Geiger counter) of individual alpha particles and other ionizing radiations.counter) of individual alpha particles and other ionizing radiations. He used it in experiments that led to the identification of the alpha particle asHe used it in experiments that led to the identification of the alpha particle as the nucleus of the helium atom and to Rutherford's determination (1912) thatthe nucleus of the helium atom and to Rutherford's determination (1912) that the nucleus of an occupies a very small volume at the centre.the nucleus of an occupies a very small volume at the centre. The Geiger-Müller counter (developed with Walther Müller) had improvedThe Geiger-Müller counter (developed with Walther Müller) had improved sensitivity, performance, and durability. It detects not only alpha particles butsensitivity, performance, and durability. It detects not only alpha particles but beta particles (electrons) and ionizing electromagnetic photons. Later in life, hebeta particles (electrons) and ionizing electromagnetic photons. Later in life, he investigated cosmic rays, artificial radioactivity, and nuclear fissioninvestigated cosmic rays, artificial radioactivity, and nuclear fission
  6. 6. AwardsAwards::  Council of the Physical Society hasCouncil of the Physical Society has this year awarded the fifteenththis year awarded the fifteenth Duddell Medal to Prof. HansDuddell Medal to Prof. Hans Geiger, of the University ofGeiger, of the University of Tubingen. The medal is awarded toTubingen. The medal is awarded to "persons who have contributed to"persons who have contributed to the advancement of knowledge bythe advancement of knowledge by the invention or design of scientificthe invention or design of scientific instruments, or by the discovery ofinstruments, or by the discovery of materials used in theirmaterials used in their construction".construction".
  7. 7. Works CitedWorks Cited  http://en.wikipedia.org/wiki/Hans_Geigerhttp://en.wikipedia.org/wiki/Hans_Geiger  http://www.midlifegamer.net/wp-http://www.midlifegamer.net/wp- content/uploads/2010/03/German_flag.jpgcontent/uploads/2010/03/German_flag.jpg  http://www.nature.com/nature/journal/v141/n3577/abs/141929b0.hthttp://www.nature.com/nature/journal/v141/n3577/abs/141929b0.ht mlml  http://www.notablebiographies.com/Fi-Gi/Geiger-Hans.htmlhttp://www.notablebiographies.com/Fi-Gi/Geiger-Hans.html  http://www.todayinsci.com/9/9_30.htmhttp://www.todayinsci.com/9/9_30.htm
  8. 8. Student IDStudent ID 9422395294223952

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