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Günter Wirths
Günter Wirths (1 June 1911 – 26 January 2005) was a German nuclear chemist in the former Soviet program of nuclear weapons and an authority on the uranium metal production, especially on the reactor-grade. Until the fall of Berlin in 1945, Wirths was employed with the ''Auergesellschaft AG'' in the production of uranium for the ''Heereswaffenamt'' as part of their ''Uranverein'' club. After taken into the Soviet custody, he became one of many German nuclear physicists who were involved in the former Soviet program of nuclear weapons in Russia and returned to Germany in 1955 where he later worked at the Degussa AG chemical company. Career Early years Günter Wirths was born in Berlin on 1 June 1911– he received doctorate in chemistry from University of Freiburg. His thesis contained the fundamental research work on the complexity on the molten salts which was done under the supervision of Walter Noddack. Wirths was a colleague of Nikolaus Riehl, who was the directo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berlin
Berlin ( ; ) is the Capital of Germany, capital and largest city of Germany, by both area and List of cities in Germany by population, population. With 3.7 million inhabitants, it has the List of cities in the European Union by population within city limits, highest population within its city limits of any city in the European Union. The city is also one of the states of Germany, being the List of German states by area, third smallest state in the country by area. Berlin is surrounded by the state of Brandenburg, and Brandenburg's capital Potsdam is nearby. The urban area of Berlin has a population of over 4.6 million and is therefore the most populous urban area in Germany. The Berlin/Brandenburg Metropolitan Region, Berlin-Brandenburg capital region has around 6.2 million inhabitants and is Germany's second-largest metropolitan region after the Rhine-Ruhr region, as well as the List of EU metropolitan areas by GDP, fifth-biggest metropolitan region by GDP in the European Union. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German People
Germans (, ) are the natives or inhabitants of Germany, or sometimes more broadly any people who are of German descent or native speakers of the German language. The Basic Law for the Federal Republic of Germany, constitution of Germany, implemented in 1949 following the end of World War II, defines a German as a German nationality law, German citizen. During the 19th and much of the 20th century, discussions on German identity were dominated by concepts of a common language, culture, descent, and history.. "German identity developed through a long historical process that led, in the late 19th and early 20th centuries, to the definition of the German nation as both a community of descent (Volksgemeinschaft) and shared culture and experience. Today, the German language is the primary though not exclusive criterion of German identity." Today, the German language is widely seen as the primary, though not exclusive, criterion of German identity. Estimates on the total number of Germ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium
Radium is a chemical element; it has chemical symbol, symbol Ra and atomic number 88. It is the sixth element in alkaline earth metal, group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1,600 years. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. For this property, it was widely used in Self-luminous paint, self-luminous paints following its discovery. Of the Radionuclide, radioactive elements that occur in quantity, radium is considered particularly Toxicity, toxic, and it is Carcinogen, carcinogenic due to the radioactivity of both it and its immediate decay product radon as well as its tendency to B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium
Uranium is a chemical element; it has chemical symbol, symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactive decay, radioactively decays, usually by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes of uranium, isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordial nuclide, primordially occurring elements. Its density is about 70% higher than that of lead and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few Parts-per notation#Parts-per expressions, parts per million in soil, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolaus Riehl
Nikolaus Vasilyevich Riehl (; 1901 — 2 August 1990) was a German nuclear chemist of Russian-Jewish descent. Before the fall of Berlin, he was director of the scientific headquarters of the Auergesellschaft AG, and was taken to the Soviet Union. Riehl was one of many of the German nuclear physicist in the former Soviet program of nuclear weapons, for which, he was recruited in 1945 until 1955 when he was released from the Soviet custody after accepting a technical position at the Technical University of Munich in Germany. He was a recipient of many former Soviet honors which he was awarded for his work in the Soviet Union. Education Nikolaus Riehl was born in Saint Petersburg, then part of the Russian Empire, in 1901. His father, Wilhelm Gottfried Riehl, was a German working in Russia as an engineer employed by Siemens; his mother, Elena Riehl (née Kagan) was Russian and was of Jewish descent. Riehl was fluent in both German and Russian languages, and attended the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molten Salt
Molten salt is salt which is solid at standard temperature and pressure but liquified due to elevated temperature. A salt that is liquid even at standard temperature and pressure is usually called a room-temperature ionic liquid, and molten salts are technically a class of ionic liquids. Examples As a reference, molten sodium chloride, table salt has a melting point (m.p.) of . A variety of eutectic mixtures have been developed with lower melting points: Chlorides *Lithium chloride and potassium chloride, m.p. . Nitrates Alkali metal nitrates are relatively low melting and thermally stable. The least stable, (m.p. ) decomposes only at . At the other extreme, cesium nitrate melts at and decomposes at 584 °C. *60:40 mixture of sodium nitrate and potassium nitrate is a liquid between . It has a heat of fusion of 161 J/g, and a heat capacity of 1.53 J/(g·K). *1:1 mixture :, m.p. . *40:7:53 ::, m. p. , stable to . Uses Molten salts have a variety of uses. Production of magnes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Freiburg
The University of Freiburg (colloquially ), officially the Albert Ludwig University of Freiburg (), is a public university, public research university located in Freiburg im Breisgau, Baden-Württemberg, Germany. The university was founded in 1457 by the House of Habsburg, Habsburg dynasty as the second university in Austrian-Habsburg territory after the University of Vienna. Today, Freiburg is the List of universities in Germany#Universities by date of establishment, fifth-oldest university in Germany, with a long tradition of teaching the humanities, social sciences and natural sciences and technology and enjoys a high academic reputation both nationally and internationally. The university is made up of 11 faculty (division), faculties and attracts students from across Germany as well as from over 120 other countries. Foreign students constitute about 18.2% of total student numbers. The University of Freiburg has been associated with figures such as Hannah Arendt, Rudolf Carna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doctor Of Philosophy
A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of Postgraduate education, graduate study and original research. The name of the degree is most often abbreviated PhD (or, at times, as Ph.D. in North American English, North America), pronounced as three separate letters ( ). The University of Oxford uses the alternative abbreviation "DPhil". PhDs are awarded for programs across the whole breadth of academic fields. Since it is an earned research degree, those studying for a PhD are required to produce original research that expands the boundaries of knowledge, normally in the form of a Thesis, dissertation, and, in some cases, defend their work before a panel of other experts in the field. In many fields, the completion of a PhD is typically required for employment as a university professor, researcher, or scientist. Definition In the context o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Soviet Federative Socialist Republic
The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR), previously known as the Russian Socialist Federative Soviet Republic and the Russian Soviet Republic, and unofficially as Soviet Russia,Declaration of Rights of the laboring and exploited people, article I. was a socialist state from 1917 to 1922, and afterwards the largest and most populous Republics of the Soviet Union, constituent republic of the Soviet Union (USSR) from 1922 to 1991, until becoming a Declaration of State Sovereignty of the Russian SFSR, sovereign part of the Soviet Union with priority of Russian laws over Union-level legislation in 1990 and 1991, the last two years of the existence of the USSR.The Free Dictionary Russian Soviet Federated Socialist Republic< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Alsos
The Soviet Alsos or Russian Alsos is the western codename for an operation that took place during 19451946 in Germany, Austria, and Czechoslovakia, in order to exploit German atomic related facilities, intellectual materials, material resources, and scientific personnel for the benefit of the Soviet atomic bomb project. The contributions of the German scientists is borne out by the many USSR State Prizes and other awards given in the wake of the second Soviet atomic bomb test, a uranium-based atomic bomb; awards for uranium production and isotope separation were prevalent. Also significant in both the first Soviet atomic bomb testa plutonium-based atomic bomb which required a uranium reactor for plutonium generationand the second test, was the Soviet acquisition of a significant amount of uranium immediately before and shortly after the close of World War II. This saved the Soviets at least a year by their own admission. Background Near the close and after the end of World W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Nuclear Program During World War II
Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ... undertook several research programs relating to nuclear technology, including nuclear weapons and nuclear reactors, before and during World War II. These were variously called () or (). The first effort started in April 1939, just months after the discovery of nuclear fission in Berlin in December 1938, but ended shortly ahead of the September 1939 Invasion of Poland, German invasion of Poland, for which many German physicists were drafted into the . A second effort under the administrative purview of the 's began on September 1, 1939, the day of the invasion of Poland. The program eventually expanded into three main efforts: (nuclear reactor) development, uranium and heavy water production, and uranium isotope s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heereswaffenamt
(WaA) was the German Army Weapons Agency. It was the centre for research and development of the Weimar Republic and later the Third Reich for weapons, ammunition and army equipment to the German Reichswehr and then Wehrmacht The ''Wehrmacht'' (, ) were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the German Army (1935–1945), ''Heer'' (army), the ''Kriegsmarine'' (navy) and the ''Luftwaffe'' (air force). The designation "''Wehrmac .... It was founded 8 November 1919 as (RWA), and 5 May 1922 the name was changed to (HWA). The task of overseeing Germany's gigantic pre-World War II rearmament program was given to the (the Army Acceptance Organization, commonly referred to as the ), a subsidiary of the . By 1940 the consisted of 25,000 personnel in five departments in 16 inspection areas, augmented by specially selected plant personnel who were assigned to assist the inspectors in each manufacturing facility. Later, in the middle of 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
