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Wilhelm Groth
Wilhelm Groth (9 January 1904 in Hamburg – 20 February 1977 in Bonn) was a German physical chemist. During World War II, he worked on the German nuclear energy project, also known as the Uranium Club; his main activity was the development of centrifuges for the enrichment of uranium. After the war, he was a professor of physical chemistry at the University of Hamburg. In 1950, he became director of the Institute of Physical Chemistry at the University of Bonn. He was a principal in the 1956 shipment of three centrifuges for uranium enrichment to Brazil. Education From 1922 to 1927, Groth studied at the ''Technische Hochschule München'' (today, the Technical University of Munich (''Technische Universität München''), the Ludwig Maximilian University of Munich (''Ludwig-Maximilians-Universität München''), and the University of Tübingen (''Eberhard Karls Universität Tübingen''). He received his doctorate in 1927 under Walther Gerlach at Tübingen. His thesis was on the dete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Groth, Sem Data , the Dutch national anthem
{{Disambiguation ...
Wilhelm may refer to: People and fictional characters * William Charles John Pitcher, costume designer known professionally as "Wilhelm" * Wilhelm (name), a list of people and fictional characters with the given name or surname Other uses * Mount Wilhelm, the highest mountain in Papua New Guinea * Wilhelm Archipelago, Antarctica * Wilhelm (crater), a lunar crater See also * Wilhelm scream, a stock sound effect * SS ''Kaiser Wilhelm II'', or USS ''Agamemnon'', a German steam ship * Wilhelmus "Wilhelmus van Nassouwe", usually known just as "Wilhelmus" ( nl, Het Wilhelmus, italic=no; ; English translation: "The William"), is the national anthem of both the Netherlands and the Kingdom of the Netherlands. It dates back to at least 1572 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Nuclear Energy Project
The Uranverein ( en, "Uranium Club") or Uranprojekt ( en, "Uranium Project") was the name given to the project in Germany to research nuclear technology, including nuclear weapons and nuclear reactors, during World War II. It went through several phases of work, but in the words of historian Mark Walker, it was ultimately "frozen at the laboratory level" with the "modest goal" to "build a nuclear reactor which could sustain a nuclear fission chain reaction for a significant amount of time and to achieve the complete separation of at least tiny amount of the uranium isotopes." The scholarly consensus is that it failed to achieve these goals, and that despite fears at the time, the Germans had never been close to producing nuclear weapons. The first effort started in April 1939, just months after the discovery of nuclear fission in December 1938, but ended only months later shortly ahead of the German invasion of Poland, when many notable physicists were drafted into the ''Wehr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerhard Hoffmann
Gerhard Hoffmann (4 August 1880 – 18 June 1945) was a German nuclear physicist. During World War II, he contributed to the German nuclear energy project, also known as the Uranium Club. Education Hoffmann studied at the University of Göttingen, the University of Leipzig, and the University of Bonn. He received his doctorate at Bonn, in 1906, under Walter Kaufmann. In 1908, he became Kaufmann’s teaching assistant at the University of Königsberg, where he completed his Habilitation in pure and applied physics in 1911. Career In 1917, Hoffmann became an Ausserordentlicher Professor and worked on precision measurement of radioactivity and research in cosmic rays. From 1928-1937, as successor to Gustav Hertz, he was Ordentlicher Professor at the University of Halle-Wittenberg. In 1937 he succeeded Peter Debye and became ordinarius professor of experimental physics at the University of Leipzig, a position he held until his death in 1945. In December 1938, the German chemist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolfgang Gentner
Wolfgang Gentner (23 July 1906 in Frankfurt am Main – 4 September 1980 in Heidelberg) was a German experimental nuclear physicist. Gentner received his doctorate in 1930 from the University of Frankfurt. From 1932 to 1935 he had a fellowship which allowed him to do postdoctoral research and study at Curie's Radium Institute at the University of Paris. From 1936 to 1945, he was a staff scientist at the Institute of Physics at the Kaiser Wilhelm Institute for Medical Research, in Heidelberg. One of his areas of specialization was nuclear photoeffects. He was granted his Habilitation from the University of Frankfurt in 1937. At the end of 1938 and early 1939, he visited the Radiation Laboratory at the University of California, Berkeley; upon his return to Germany, he participated in the construction of a cyclotron at Heidelberg. During World War II, he participated in the German nuclear energy project, also called the Uranium Club. After World War II, Gentner became a professor at th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Geiger
Johannes Wilhelm "Hans" Geiger (; ; 30 September 1882 – 24 September 1945) was a German physicist. He is best known as the co-inventor of the detector component of the Geiger counter and for the Geiger–Marsden experiment which discovered the atomic nucleus. He was the brother of meteorologist and climatologist Rudolf Geiger. Biography Geiger was born at Neustadt an der Haardt, Germany. He was one of five children born to the Indologist Wilhelm Ludwig Geiger, who was a professor at the University of Erlangen. In 1902, Geiger started studying physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ... and mathematics at the University of Erlangen and was awarded a doctorate in 1906. His thesis was on electrical discharges through gases. He received a fellowship to the Victo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Döpel
Georg Robert Döpel (3 December 1895 – 2 December 1982) was a German experimental nuclear physicist. He was a participant in a group known as the " first ''Uranverein''", which was spawned by a meeting conducted by the ''Reichserziehungsministerium'', in April 1939, to discuss the potential of a sustained nuclear reaction. He worked under Werner Heisenberg at the University of Leipzig, and he conducted experiments on spherical layers of uranium oxide surrounded by heavy water. He was a contributor to the German nuclear weapon project (Uranprojekt). In 1945, he was sent to Russia to work on the Soviet atomic bomb project. He returned to Germany in 1957, and he became professor of applied physics and director of the ''Institut für Angewandte Physik'' at the ''Hochschule für Elektrotechnik'', now Technische Universität, in Ilmenau (Thuringia). Early life Döpel was born in Neustadt. From 1919 to 1924, he attended the University of Leipzig, the Friedrich Schiller Univers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walther Bothe
Walther Wilhelm Georg Bothe (; 8 January 1891 – 8 February 1957) was a German nuclear physicist, who shared the Nobel Prize in Physics in 1954 with Max Born. In 1913, he joined the newly created Laboratory for Radioactivity at the Reich Physical and Technical Institute (PTR), where he remained until 1930, the latter few years as the director of the laboratory. He served in the military during World War I from 1914, and he was a prisoner of war of the Russians, returning to Germany in 1920. Upon his return to the laboratory, he developed and applied coincidence methods to the study of nuclear reactions, the Compton effect, cosmic rays, and the wave–particle duality of radiation, for which he would receive the Nobel Prize in Physics in 1954. In 1930 he became a full professor and director of the physics department at the University of Giessen. In 1932, he became director of the Physical and Radiological Institute at the University of Heidelberg. He was driven out of this posit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Chain Reaction
In nuclear physics, a nuclear chain reaction occurs when one single nuclear reaction causes an average of one or more subsequent nuclear reactions, thus leading to the possibility of a self-propagating series of these reactions. The specific nuclear reaction may be the fission of heavy isotopes (e.g., uranium-235, 235U). A nuclear chain reaction releases several million times more energy per reaction than any chemical reaction. History Chemical chain reactions were first proposed by German chemist Max Bodenstein in 1913, and were reasonably well understood before nuclear chain reactions were proposed. It was understood that chemical chain reactions were responsible for exponentially increasing rates in reactions, such as produced in chemical explosions. The concept of a nuclear chain reaction was reportedly first hypothesized by Hungarian scientist Leó Szilárd on September 12, 1933. Szilárd that morning had been reading in a London paper of an experiment in which protons f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reichsforschungsrat
The Reichsforschungsrat was created in Germany in 1936 under the Education Ministry for the purpose of centralized planning of all basic and applied research, with the exception of aeronautical research. It was reorganized in 1942 and placed under the Ministry of Armaments. Creation On the initiative of Erich Schumann, the Reichsforschungsrat (RFR, Reich Research Council) was inaugurated on 16 March 1937 by Reich Minister Bernhard Rust of the Reichserziehungsministerium (REM, Reich Education Ministry). The RFR was set up to centralize planning for all basic and applied research in Germany, with the exception of aeronautical research, which was under the supervision of Reich Marshal Hermann Göring. General Karl Heinrich Emil Becker, head of the ''Heereswaffenamt'' (HWA, Army Ordnance Office) and dean and professor in the faculty of defense technology at the Technische Hochschule Berlin, was its president (1937 to 1940). After Becker’s death in 1940, Rust took over as president of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reichserziehungsministerium
The Reich Ministry of Science, Education and Culture (german: , also unofficially known as the "Reich Education Ministry" (german: ), or "REM") existed from 1934 until 1945 under the leadership of Bernhard Rust and was responsible for unifying the education system of Nazi Germany and aligning it with the goals of Nazi leadership. Background The REM was the successor to the former ''Preußisches Ministerium für Wissenschaft, Kunst und Volksbildung'' (Prussian Ministry of Science, Art and Culture), creating for the first time in Germany a centralized and hierarchical institution in control of the Reich's education sector. In 1934, the REM took over from the ''Reichsinnenministerium'' (Reich Interior Ministry) the supervision of colleges and universities in Germany, as well as research institutions such as the ''Physikalisch-Technische Reichsanstalt'' (abbreviated PTR; translation: Reich Physical and Technical Institute.); today, the PTR is known as the ''Physikalisch-Technische ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Joos
Georg Jakob Christof Joos (25 May 1894 in Bad Urach, German Empire – 20 May 1959 in Munich, West Germany) was a German experimental physicist. He wrote ''Lehrbuch der theoretischen Physik'', first published in 1932 and one of the most influential theoretical physics textbooks of the 20th Century. Education Joos began his higher education in 1912 at the Technische Hochschule Stuttgart. He then went to study at the University of Tübingen, where he received his doctorate in 1920 under C. Füchtbauer.Hentschel, 1996, Appendix F; see the entry for Joos. Career After receipt of his doctorate, Joos became a teaching assistant to Jonathan Zenneck at the Technical University of Munich. In 1922, he became a Privatdozent there.There were 50-odd volumes of the FIAT Reviews of German Science, which covered the period 1930 to 1946 – cited by Max von Laue in Document 117, Hentschel, 1996, 393-395. (Office of Military Government for Germany Field Information Agencies, Technical, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat from nuclear fission is passed to a working fluid (water or gas), which in turn runs through steam turbines. These either drive a ship's propellers or turn electrical generators' shafts. Nuclear generated steam in principle can be used for industrial process heat or for district heating. Some reactors are used to produce isotopes for medical and industrial use, or for production of weapons-grade plutonium. , the International Atomic Energy Agency reports there are 422 nuclear power reactors and 223 nuclear research reactors in operation around the world. In the early era of nuclear reactors (1940s), a reactor was known as a nuclear pile or atomic pile (so-called because the graphite moderator blocks of the first reactor were placed into a tall pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
