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Topic: Hans Geiger

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September 30

	Hans Geiger - Wikipedia, the free encyclopedia
		Johannes (Hans) Wilhelm Geiger (September 30, 1882 – September 24, 1945) was a German physicist.
		He was one of five children born to Wilhelm Ludwig Geiger, a philosophy professor at the University of Erlangen.
		In 1902 Geiger began to study physics and mathematics in Erlangen and later attained a doctorate in 1906.
	en.wikipedia.org /wiki/Hans_Geiger (268 words)

	TU Berlin - The shoulders on which we stand - Festschrift zur 125-Jahr-Feier der TU Berlin
		Johannes (Hans) Wilhelm Geiger was born in Neustadt an der Weinstraße on 30 September 1882.
		Hans Geiger enrolled at the University of Erlangen in 1901, where he studied mathematics and physics, though he did his compulsory military service in the first two semesters.
		Hans Geiger moved to Tübingen in 1929 and finally to Berlin in 1936, where he was made director of the Physics Institute of the TH.
	www.tu-berlin.de /presse/125jahre/festschrift/geiger_e.htm (517 words)

	Geiger counter - Wikipedia, the free encyclopedia
		Geiger counters can detect photons, alpha, beta, and gamma radiation, but not neutrons.
		Hans Geiger developed the Geiger counter in 1908 together with Ernest Rutherford.
		In 1928 Geiger and Walther Müller (a PhD student of Geiger) improved the counter so that it could detect all kinds of ionizing radiation.
	en.wikipedia.org /wiki/Geiger_counter (361 words)

	Hans Jacob Geiger
		A granite marker to Herman Geiger, a pioneer citizen of the Congaree area, is to be dedicated at 3:30 p.m.
		The Geiger's (Gygers) arrived in Charleston, Feb. 1, 1737, and settled in the Congarees.
		W.W. Hawes (Daisy Geiger) to whose parents and descendants the cemetery was deeded in 1917.
	www.sc-families.org /tree/I108.html (1258 words)

	HANS GEIGER (Site not responding. Last check: 2007-11-05)
		Bekannt wurde Geiger durch den nach ihm benannten und von ihm zusammen mit Walter Müller entwickelten Geigerzähler.
		Geiger begann 1902 Physik und Mathematik in Erlangen zu studieren, wo er 1906 promovierte.
		1912 wechselte Geiger zur Physikalisch-Technischen Reichsanstalt in Berlin-Charlottenburg, und 1925 weiter nach Kiel.
	www.toonorama.com /encyclopedia/H/Hans_Geiger (125 words)

	Hans Geiger
		Johannes (Hans) Wilhelm Geiger is known mainly for his radiation counter, the other information of his life and accomplishments have fallen through the cracks of history.
		Geiger supported the research into the likelihood of an atomic bomb; however, it is known that Geiger disliked the military and no source could be found to determine if he personally agreed or disagreed with Nazi ideals.
		Hans Geiger also contributed to the discovery of the nucleus and the study of sub-atomic particles.
	www.byzantinecommunications.com /adamhoward/homework/college/geiger.html (1572 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		Geiger counters can detect alpha, beta, and gamma radiation, but not neutrons.
		Hans Geiger developed the Geiger counter in 1928.
		It has superseded the Geiger counter because of its much longer life and lower operating voltage.
	www.askmytutor.co.uk /g/ge/geiger_counter.html (147 words)

	Press Release: The 1990 Nobel Prize in Physics
		Geiger and Marsden (1909) found to their surprise that some of the alpha particles were scattered at very large angles, such as 90°, to their original direction.
		The head in Manchester, where Geiger and Marsden were working, was Ernest Rutherford, one of the most eminent physicists of the time and winner of the 1908 Nobel Prize in Chemistry.
		Rutherford undertook a systematic theoretical investigation of Geiger's and Marsden's results and those of similar experiments with beta particles (as electrons were called at the time).
	nobelprize.org /physics/laureates/1990/press.html (1701 words)

	Hans Geiger (Site not responding. Last check: 2007-11-05)
		Being a German nuclear physicist, Geiger was the inventor of the Geiger counter which was a detector for radioactivity.
		Geiger was awarded the Ph.D. by the University of Erlangen in 1906.
		With Walther Bothe, Geiger devised the technique of coincidence counting and used it in 1924 to clarify the detail of the Compton effect.
	homepages.ihug.co.nz /~jrcpeng/geiger.html (388 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		Geiger was awarded the Ph.D. by the University of Erlangen in 1906 and shortly thereafter joined the staff of the University of Manchester, where he became one of the most valuable collaborators of Ernest Rutherford.
		Moving in 1912 to the Physikalisch-Technische Reichsanstalt (German National Institute for Science and Technology) in Berlin, Geiger continued his studies of atomic structure and, with Walther Bothe, devised the technique of coincidence counting and used it in 1924 to clarify the details of the Compton effect.
		In 1929 Geiger took up a post at the University of Tübingen, where he made his first observation of a cosmic-ray shower.
	www.phy.bg.ac.yu /web_projects/giants/geiger.html (199 words)

	Inventor of the Week: Archive
		Nuclear physicist Hans Geiger, whose surname is known the world over for his invention of the radioactivity measuring device known as the Geiger counter, was born Johannes Wilhelm Geiger in Neustadt-an-der-Haardt, Germany, on September 30, 1882.
		Geiger studied physics at the University of Munich and went on to complete his doctoral degree in the subject at the University of Erlangen in 1906.
		Geiger was also involved in a number of experiments that would lead to Rutherford’s breakthrough theory of the atom, which declared that the nucleus occupies a very small volume at the center of every atom.
	web.mit.edu /invent/iow/geiger.html (602 words)

	Hans Geiger - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-05)
		Detectors in Heavy-Ion Reactions: Proceedings of the Symposium Commemorating the 100th Anniversary of Hans Geiger's Birth, Held at the Hahn-Meitner-I (Lecture Notes in Chemistry)
		Hans Geiger: Spuren aus einem Leben für die Physik (Berliner Beiträge zur Geschichte der Naturwissenschaften und der Technik)
		Hans Geiger und die elektrischen Zählmethoden, 1908-1928 (Berliner Beiträge zur Geschichte der Naturwissenschaften und der Technik)
	encyclopedia.worldsearch.com /hans_geiger.htm (313 words)

	John Ferriar, Mark Roget, William Sturgeon, John Dalton, Hans Geiger and science and discovery in Manchester
		Born Johannes Wilhelm Geiger, physicist Hans Geiger was born in Neustadt, Germany, in 1882.
		Geiger did most of the original so-called "Rutherford scattering" experiment with Marsden - as a result of this work he devised his ionisation counter.
		It is thought that Geiger held an unwavering loyalty to the Nazi Party and it is alleged that this led him to betray many of his Jewish colleagues.
	www.manchester2002-uk.com /celebs/scientists2.html (1655 words)

	Geiger, Hans -- Encyclopædia Britannica
		Geiger was awarded the Ph.D. by the University of Erlangen in 1906 and shortly thereafter joined the staff of the University of Manchester, where he became one of the most valuable…
		The British physicist Ernest Rutherford spoke of counting the atoms and in 1908, with the German physicist Hans Geiger, disclosed...
		U.S. physicist Hans Albrecht Bethe was born in Strasbourg, Alsace-Lorraine.
	www.britannica.com /eb/article-9036303 (699 words)

	Geiger, Hans (Wilhelm) (Site not responding. Last check: 2007-11-05)
		Geiger was born in Neustadt, Rheinland-Pfalz, and studied at Munich and Erlangen.
		On his return from Manchester 1912, Geiger became head of the Radioactivity Laboratories at the Physikalische Technische Reichsanstalt in Berlin, where he established a successful research group.
		Subjects that Geiger studied under Rutherford include the mathematical relationship between the amount of alpha scattering and atomic weight, the relationship between the range of an alpha particle and its velocity, the various disintegration products of uranium, and the relationship between the range of an alpha particle and the radioactive constant.
	cartage.org.lb /en/themes/Biographies/MainBiographies/G/Geiger/1.html (171 words)

	The History of the Kaiser Wilhelm Institute for Medical Research: 1929-1939
		He and Geiger became the leading experts on small angle light scattering, with Bothe summarizing their findings in an influential handbook that established the foundation for modern methods of analysis of scattering processes.
		Some of Geiger and Bothe's most important contributions revolved around their development of the method of coincidence, which was used to detect atomic particles or radiation and associate them with individual atomic reactions or events.
		Geiger shook his head and replied simply 'Thrown out!' And then the two stood there laughing so hard with their arms on each other's shoulders.
	nobelprize.org /chemistry/articles/states/walther-bothe.html (5836 words)

	AllRefer.com - Johannes Wilhelm Geiger (Physics, Biography) - Encyclopedia
		Johannes Wilhelm Geiger (Hans Geiger)[yOhAn´us vil´helm gI´gur] Pronunciation Key, 1882–1945, German physicist.
		Geiger received a doctorate in physics at Erlangen in 1906, then went to Manchester, where he assisted British chemist Ernest Rutherford.
		In 1912, Geiger returned to Germany, directing radiation research first at the Physikalisch-Technische Reichsanstalt and later at the universities of Kiel and TUbingen and at the Technische Hochschule, Berlin.
	reference.allrefer.com /encyclopedia/G/Geiger-J.html (197 words)

	Herman Geiger
		Birth date of Herman Geiger appered in article "Geiger Marker to be dedicated; story of historic family recalled", by Mrs.
		Death year of Herman Geiger appered in article "Geiger Marker to be dedicated; story of historic family recalled", by Mrs.
		Marriage date of Herman Geiger appered in article "Geiger Marker to be dedicated; story of historic family recalled", by Mrs.
	www.sc-families.org /tree/I106.html (609 words)

	Hans Geiger (Site not responding. Last check: 2007-11-05)
		Bekannt wurde Geiger durch den nach benannten und von ihm zusammen mit Walter Müller entwickelten Geigerzähler.
		1912 wechselte Geiger zur Physikalisch-Technischen Reichsanstalt in Berlin -Charlottenburg und 1925 weiter nach Kiel.
		Dort entwickelte er zusammen mit dem Walter Müller den nach ihm benannten Geigerzähler.
	de.freeglossary.com /Hans_Geiger (107 words)

	Hans Geiger (Site not responding. Last check: 2007-11-05)
		They include German physicist Hans Geiger, co-inventor of the Geiger counter, in 1882; film director Lewis Milestone ('All Quiet on the Western Front') in 1895...
		Hans Kemp, a principal with the Staubach Company who works with many of the...
		Ed Geiger, a longtime business owner who is active in the group, South Lake Union...
	www.wikiverse.org /hans-geiger (288 words)

	Hans Geiger Biography / Biography of Hans Geiger Main Biography
		university · physicists ·; the eldest · ernest rutherford ·; radioactivity · alpha · rutherford · alpha particles · philology · nuclear physics ·; geiger counter · radioactive substances · geiger · experimental physicists ·; hans geiger · palatinate · erlangen ·; neustadt · arthur schuster · wilhelm geiger
		Hans Geiger was a German nuclear physicist best known for his invention of the Geiger counter, a device used for counting atomic particles, and for his pioneering work in nuclear physics with Ernest Rutherford.
		His father, Wilhelm Ludwig Geiger, was a professor of philology at the University of Erlangen from 1891 to 1920.
	www.bookrags.com /biography-hans-geiger (225 words)

	Hans Geiger
		Hans Geiger was born in Neustadt, Germany, in 1882.
		Over the next couple of years Geiger studied the mathematical relationship between the amount of alpha scattering and atomic weight.
		When Geiger returned to Germany in 1912 and was appointed as head of the Physikalische Technische Reichsanstalt in Berlin.
	www.spartacus.schoolnet.co.uk /GERgeiger.htm (126 words)

	Geiger, Johannes (Hans) Wilhelm - Onmeda: Medizin und Gesundheit
		Geiger ist der Allgemeinheit vor allem durch das Geiger-Müller-Zählrohr bekannt.
		1902 nahm Geiger in Erlangen das Studium der Mathematik und Physik auf, trat 1904 in das Institut von Eilhard Wiedemann ein und promovierte hier 1906 mit einer Arbeit über "Strahlungs-, Temperatur- und Potentialmessungen in Entladungsröhren mit starken Strömen".
		Daneben hatten Geigers Arbeiten über das Wesen der Alphateilchen großen Einfluss auf das 1911 von Rutherford aufgestellte Atommodell.
	www.medicine-worldwide.de /persoenlichkeiten/geiger.html (524 words)

	Rutherford Scattering
		In Ernest Rutherford's laboratory, Hans Geiger and Ernest Marsden (a 20 yr old undergraduate student) carried out experiments to study the scattering of alpha particles by thin metal foils.
		Based on the Thomson model of the atom, all of the alpha particles should have been found within a small fraction of a degree from the beam, but Geiger and Marsden found a few scattered alphas at angles over 140 degrees from the beam.
		Geiger and Marsden showed that the number of scattered alpha particles as a function of scattering angle was consistent with a small, concentrated positive nucleus.
	hyperphysics.phy-astr.gsu.edu /hbase/nuclear/rutsca2.html (1010 words)

	Geiger Mueller Tube (Site not responding. Last check: 2007-11-05)
		It differs from the Geiger-Müller counter in that the discharge mechanism takes advantage of the metastable state of the inert gas atom to ionize the halogen molecule and produces a more efficient discharge which permits it to operate at much lower voltages.
		Some Geiger counters display a dose rate (mRh), but this is subject to error as the instrument does not discriminate between radiation at different energy levels.
		It was named for Hans Geiger and W. Müller, who invented it in the 1920s.
	www.wikiverse.org /geiger-mueller-tube (294 words)

	The Geiger Counter
		Fast electrons and ions emitted by radioactive materials do ionize atoms with which they collide, and Hans Geiger, an associate of Rutherford (ions, history) used this property to invent a sensitive detector for such particles.
		A "Geiger counter" usually contains a metal tube with a thin metal wire along its middle, the space in between them sealed off and filled with a suitable gas, and with the wire at about +1000 volts relative to the tube.
		An ion or electron penetrating the tube (or an electron knocked out of the wall by X-rays or gamma rays) tears electrons off atoms in the gas, and because of the high positive voltage of the central wire, those electrons are then attracted to it.
	www.phy6.org /Education/wgeiger.html (256 words)

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