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uranium-235 | A Wisdom Archive on uranium-235 | | uranium-235 A selection of articles related to uranium-235 | |
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| ARTICLES RELATED TO uranium-235 | |
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| | |  uranium-235: Encyclopedia II - Trinity test - Planning for the testPlanning for the test itself was assigned to Kenneth Bainbridge, a professor of physics at Harvard University, working under explosives expert George Kistiakowsky. A proper site had to be located that would guarantee secrecy of the project's goals even as it planned to detonate a nuclear weapon of unknown strength, proper scientific equipment had to be assembled for retrieving data from the test itself, and safety guidelines had to be developed to protect project personnel from the results of an unknown and highly dangerous experiment. Official test photographer Berlyn Brixner ...
See also:Trinity test, Trinity test - Background, Trinity test - Research design test and production, Trinity test - Planning for the test, Trinity test - Site for the test, Trinity test - Origin of the name, Trinity test - Predictions for the test result, Trinity test - Preparing the test, Trinity test - The explosion, Trinity test - After the test Read more here: » Trinity test: Encyclopedia II - Trinity test - Planning for the test |
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| | | | uranium-235: Encyclopedia II - Enriched uranium - Methods Isotope separation is a difficult and energy intensive activity. Enriching uranium is difficult because the two isotopes are very similar in weight: 235U is only 1.26% lighter than 238U. Several production techniques applied to enrichment have been used, and several are under investigation. In general these methods exploit the slight differences in atomic weights of the various isotopes. Some work is being done that would use nuclear resonance however it is not certain if any of these ...
See also:Enriched uranium, Enriched uranium - Grades, Enriched uranium - Highly enriched uranium HEU, Enriched uranium - Low-enriched uranium LEU, Enriched uranium - Slightly enriched uranium SEU, Enriched uranium - Methods, Enriched uranium - Thermal Diffusion, Enriched uranium - Gaseous diffusion, Enriched uranium - The Gas centrifuge, Enriched uranium - The Zippe centrifuge, Enriched uranium - Aerodynamic Processes, Enriched uranium - Electromagnetic Isotope Separation, Enriched uranium - Laser processes, Enriched uranium - Chemical methods, Enriched uranium - Plasma separation, Enriched uranium - The SWU separative work unit, Enriched uranium - Downblending Read more here: » Enriched uranium: Encyclopedia II - Enriched uranium - Methods |
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| | | | uranium-235: Encyclopedia II - History of nuclear weapons - History
History of nuclear weapons - Prelude: Physics and politics in the 1930s.
See the main articles at History of physics, Nazi Germany, and World War II.
In the first decades of the twentieth century, physics was revolutionized with developments in the understanding of the nature of atoms. In 1898, Marie Curie and her husband Pierre had discovered that present in pitchblende, an ore of uranium, was a substance which emitted large amounts of radioactivity, which they named radium. This raise ...
See also:History of nuclear weapons, History of nuclear weapons - History, History of nuclear weapons - Prelude: Physics and politics in the 1930s, History of nuclear weapons - From Los Alamos to Hiroshima, History of nuclear weapons - Soviet atomic bomb project, History of nuclear weapons - The hydrogen bomb and the power of the Sun, History of nuclear weapons - Nuclear strategy and the knot of war, History of nuclear weapons - Cold War, History of nuclear weapons - Nuclear proliferation Read more here: » History of nuclear weapons: Encyclopedia II - History of nuclear weapons - History |
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| | | | uranium-235: Encyclopedia II - Japanese atomic program - Development The Japanese programs' source of uranium ore was Korea, which had been under Japanese control since 1905. Dr. Nishina investigated a number of methods for enrichment of uranium, and decided that the gaseous diffusion method would be most worth pursuing. However there is no evidence that production plants of the size used by the Manhattan Project were ever constructed, and the Manhattan Project plants, for all of their vastness, were only able to pr ...
See also:Japanese atomic program, Japanese atomic program - Atomic program of the Japanese Army Air Force, Japanese atomic program - Atomic program of the Japanese Navy, Japanese atomic program - Development, Japanese atomic program - Aftermath, Japanese atomic program - Current nuclear activities in Japan, Japanese atomic program - Disputed reports about the nuclear program in Konan in 1945 Read more here: » Japanese atomic program: Encyclopedia II - Japanese atomic program - Development |
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| | | | uranium-235: Encyclopedia II - Teller-Ulam design - Basic principle The basic principle of the Teller-Ulam configuration is based upon the idea that different parts of a thermonuclear weapon can be chained together in "stages" which allow for the full detonation of each. At a bare minimum, this implies a primary section which consists of a fission bomb (a "trigger"), and a secondary section which consists of fusion fuel. Because of the "staged" design, it is thought that a tertiary section, again of fusion fuel, could be added as well, based on the same principle of ...
See also:Teller-Ulam design, Teller-Ulam design - Public body of knowledge concerning nuclear weapon design, Teller-Ulam design - Basic principle, Teller-Ulam design - Radiation pressure, Teller-Ulam design - Foam plasma pressure, Teller-Ulam design - Tamper/Pusher ablation, Teller-Ulam design - Comparing the implosion mechanisms, Teller-Ulam design - Proposed design variations, Teller-Ulam design - History, Teller-Ulam design - Original Super, Teller-Ulam design - Credit controversy, Teller-Ulam design - Testing, Teller-Ulam design - Soviet developments, Teller-Ulam design - British developments, Teller-Ulam design - Other countries, Teller-Ulam design - Public knowledge, Teller-Ulam design - DOE statements, Teller-Ulam design - The Progressive case, Teller-Ulam design - Variations, Teller-Ulam design - Richard Rhodes' Ivy Mike device in Dark Sun, Teller-Ulam design - W88 revelations Read more here: » Teller-Ulam design: Encyclopedia II - Teller-Ulam design - Basic principle |
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| | | | uranium-235: Encyclopedia II - The 20th century in review - Major events The 20th century was marked by a period of change. With inventions such as the light bulb, the automobile, and the telephone in the late 1800s, the quality of life improved for many. Alongside such technological progress, no one could have expected what a change 100 years would have on the political world. The United States made huge gains economically and politically; by 1900, the U.S. was the world's leading industrial power in terms of output 1. Africa, Central and South America, and Asia also gradually drifted t ...
See also:The 20th century in review, The 20th century in review - Major events, The 20th century in review - The Great War, The 20th century in review - Russian Revolution, The 20th century in review - Between two wars, The 20th century in review - Global war, The 20th century in review - The Post-War World, The 20th century in review - The World at the End of the Twentieth century, The 20th century in review - Notes Read more here: » The 20th century in review: Encyclopedia II - The 20th century in review - Major events |
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| | | | uranium-235: Encyclopedia II - TUBE ALLOYS - 1942 onwards The American effort increased rapidly and soon outstripped the British. However separate research continued in each country with some exchange of information. Several of the key British scientists visited the USA early in 1942 and were given full access to all of the information available. They were astounded at the momentum that the American atomic bomb project had then assumed.
The slow neutron research at Cambridge, which the British had thought was not relevant to bomb-making, suddenly acquired military significance, because it pr ...
See also:TUBE ALLOYS, TUBE ALLOYS - The Paris Group, TUBE ALLOYS - Frisch and Peierls, TUBE ALLOYS - Tizard Mission, TUBE ALLOYS - Isotopic separation, TUBE ALLOYS - Plutonium, TUBE ALLOYS - Oliphant's visit to the United States, TUBE ALLOYS - 1942 onwards, TUBE ALLOYS - Post-war Read more here: » TUBE ALLOYS: Encyclopedia II - TUBE ALLOYS - 1942 onwards |
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| | | | uranium-235: Encyclopedia II - Nuclear weapons and the United States - Development history
Nuclear weapons and the United States - Manhattan Project.
The United States of America first began developing nuclear weapons during World War II under the order of President Franklin Delano Roosevelt in 1939, motivated by a fear that they were engaged in a potential race with Nazi Germany to develop such a weapon. After a slow start under the direction of the National Bureau of Standards, at the urging of British scientists and American administrators the program was put under the Office for Scientific Research ...
See also:Nuclear weapons and the United States, Nuclear weapons and the United States - Development history, Nuclear weapons and the United States - Manhattan Project, Nuclear weapons and the United States - Cold War, Nuclear weapons and the United States - Post-Cold War, Nuclear weapons and the United States - Nuclear testing, Nuclear weapons and the United States - Delivery systems, Nuclear weapons and the United States - Public reactions, Nuclear weapons and the United States - Accidents, Nuclear weapons and the United States - Agencies, Nuclear weapons and the United States - Facilities, Nuclear weapons and the United States - Proliferation, Nuclear weapons and the United States - Current status Read more here: » Nuclear weapons and the United States: Encyclopedia II - Nuclear weapons and the United States - Development history |
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| | | | uranium-235: Encyclopedia II - Hans Bethe - Biography Bethe was born in Strassburg (then part of Germany, now Strasbourg, France). He studied physics at Frankfurt and obtained his doctorate from the University of Munich with supervisor Arnold Sommerfeld, after which he did postdoctoral stints in Cambridge and at Enrico Fermi's laboratory in Rome. He left Germany in 1933 when the Nazis came to power and he lost his job (his mother was Jewish) at the University of Tubingen, moving first to England where he held a provisory position of Lecturer for the year 1933-1934 and in the fall of 1934, a fellowship at the University of Bristol. In England, Bethe worked with the theoretician Rudolf Peierls on ...
See also:Hans Bethe, Hans Bethe - Biography, Hans Bethe - Manhattan Project, Hans Bethe - Hydrogen bomb, Hans Bethe - Political stances, Hans Bethe - Awards and legacy, Hans Bethe - Honors Read more here: » Hans Bethe: Encyclopedia II - Hans Bethe - Biography |
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| | | | uranium-235: Encyclopedia II - Technetium - Occurrence and production Since technetium is unstable, only minute traces occur naturally in the Earth's crust as a spontaneous fission product of uranium. In 1999 David Curtis (see above) estimated that a kilogram of uranium contains 1 nanogram (1×10−9 g) of technetium. Extraterrestrial technetium was found in some red giant stars (S-, M-, and N-types) that contain an absorption line in their spectrum indicating the presence of this element.
In contrast with the rare natural occurrence, bulk quantities of technetium-99 are produced each year fr ...
See also:Technetium, Technetium - Notable characteristics, Technetium - Applications, Technetium - Nuclear medicine, Technetium - Industrial, Technetium - History, Technetium - Pre-discovery search, Technetium - Disputed 1925 discovery, Technetium - Official discovery and later history, Technetium - Occurrence and production, Technetium - Part of radioactive waste, Technetium - Reductive immobilization, Technetium - Chemical means, Technetium - Biological means, Technetium - Isotopes, Technetium - Stability of technetium isotopes, Technetium - Precautions Read more here: » Technetium: Encyclopedia II - Technetium - Occurrence and production |
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| | | | uranium-235: Encyclopedia II - Atomic bombings of Hiroshima and Nagasaki - Debate over the decision to drop the bombs
Atomic bombings of Hiroshima and Nagasaki - Support for use of atomic bombs.
Although supporters of the bombing concede that the civilian leadership in Japan was cautiously and discreetly sending out diplomatic communiques as far back as January of 1945, following the Allied invasion of Luzon in the Philippines, they point out that Japanese military officials were unanimously opposed to any negotiations before the use of the atomic bomb.
While some members of the civilian leadership did use covert diplomat ...
See also:Atomic bombings of Hiroshima and Nagasaki, Atomic bombings of Hiroshima and Nagasaki - Prelude to the bombings, Atomic bombings of Hiroshima and Nagasaki - Choice of targets, Atomic bombings of Hiroshima and Nagasaki - Hiroshima, Atomic bombings of Hiroshima and Nagasaki - Hiroshima during World War II, Atomic bombings of Hiroshima and Nagasaki - The bombing, Atomic bombings of Hiroshima and Nagasaki - Japanese realization of the bombing, Atomic bombings of Hiroshima and Nagasaki - Survival of some structures, Atomic bombings of Hiroshima and Nagasaki - Nagasaki, Atomic bombings of Hiroshima and Nagasaki - Nagasaki during World War II, Atomic bombings of Hiroshima and Nagasaki - The bombing, Atomic bombings of Hiroshima and Nagasaki - Debate over the decision to drop the bombs, Atomic bombings of Hiroshima and Nagasaki - Support for use of atomic bombs, Atomic bombings of Hiroshima and Nagasaki - Opposition to use of atomic bombs, Atomic bombings of Hiroshima and Nagasaki - Cultural notes Read more here: » Atomic bombings of Hiroshima and Nagasaki: Encyclopedia II - Atomic bombings of Hiroshima and Nagasaki - Debate over the decision to drop the bombs |
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