Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Nuclear_fission> ?p ?o }
- Nuclear_fission abstract "In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay.Nuclear fission of heavy elements was discovered on December 17, 1938 by German Otto Hahn and his assistant Fritz Strassmann, and explained theoretically in January 1939 by Lise Meitner and her nephew Otto Robert Frisch. Frisch named the process by analogy with biological fission of living cells. It is an exothermic reaction which can release large amounts of energy both as electromagnetic radiation and as kinetic energy of the fragments (heating the bulk material where fission takes place). In order for fission to produce energy, the total binding energy of the resulting elements must be less negative (higher energy) than that of the starting element.Fission is a form of nuclear transmutation because the resulting fragments are not the same element as the original atom. The two nuclei produced are most often of comparable but slightly different sizes, typically with a mass ratio of products of about 3 to 2, for common fissile isotopes. Most fissions are binary fissions (producing two charged fragments), but occasionally (2 to 4 times per 1000 events), three positively charged fragments are produced, in a ternary fission. The smallest of these fragments in ternary processes ranges in size from a proton to an argon nucleus.Apart from fission induced by a neutron, harnessed and exploited by humans, a natural form of spontaneous radioactive decay (not requiring a neutron) is also referred to as fission, and occurs especially in very high-mass-number isotopes. Spontaneous fission was discovered in 1940 by Flyorov, Petrzhak and Kurchatov in Moscow, when they decided to confirm that, without bombardment by neutrons, the fission rate of uranium was indeed negligible, as predicted by Niels Bohr; it wasn't.The unpredictable composition of the products (which vary in a broad probabilistic and somewhat chaotic manner) distinguishes fission from purely quantum-tunnelling processes such as proton emission, alpha decay and cluster decay, which give the same products each time. Nuclear fission produces energy for nuclear power and drives the explosion of nuclear weapons. Both uses are possible because certain substances called nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.The amount of free energy contained in nuclear fuel is millions of times the amount of free energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very dense source of energy. The products of nuclear fission, however, are on average far more radioactive than the heavy elements which are normally fissioned as fuel, and remain so for significant amounts of time, giving rise to a nuclear waste problem. Concerns over nuclear waste accumulation and over the destructive potential of nuclear weapons may counterbalance the desirable qualities of fission as an energy source, and give rise to ongoing political debate over nuclear power.".
- Nuclear_fission thumbnail Nuclear_fission.svg?width=300.
- Nuclear_fission wikiPageExternalLink h1019v2.pdf.
- Nuclear_fission wikiPageExternalLink Fission.
- Nuclear_fission wikiPageExternalLink 01.html.
- Nuclear_fission wikiPageExternalLink index.shtml.
- Nuclear_fission wikiPageExternalLink Fission1.shtml.
- Nuclear_fission wikiPageExternalLink Movie4.shtml.
- Nuclear_fission wikiPageExternalLink what-is-fission.htm.
- Nuclear_fission wikiPageID "22054".
- Nuclear_fission wikiPageLength "71593".
- Nuclear_fission wikiPageOutDegree "406".
- Nuclear_fission wikiPageRevisionID "707705991".
- Nuclear_fission wikiPageWikiLink Actinide.
- Nuclear_fission wikiPageWikiLink Albert_Einstein.
- Nuclear_fission wikiPageWikiLink Alpha_decay.
- Nuclear_fission wikiPageWikiLink Alpha_particle.
- Nuclear_fission wikiPageWikiLink Ames_Laboratory.
- Nuclear_fission wikiPageWikiLink Ames_process.
- Nuclear_fission wikiPageWikiLink Anschluss.
- Nuclear_fission wikiPageWikiLink Argon.
- Nuclear_fission wikiPageWikiLink Arthur_Wahl.
- Nuclear_fission wikiPageWikiLink Atom.
- Nuclear_fission wikiPageWikiLink Atomic_bombings_of_Hiroshima_and_Nagasaki.
- Nuclear_fission wikiPageWikiLink Atomic_mass.
- Nuclear_fission wikiPageWikiLink Atomic_nucleus.
- Nuclear_fission wikiPageWikiLink Atomic_number.
- Nuclear_fission wikiPageWikiLink Ausonium.
- Nuclear_fission wikiPageWikiLink Barium.
- Nuclear_fission wikiPageWikiLink Berlin.
- Nuclear_fission wikiPageWikiLink Beryllium.
- Nuclear_fission wikiPageWikiLink Beta_decay.
- Nuclear_fission wikiPageWikiLink Beta_particle.
- Nuclear_fission wikiPageWikiLink Binding_energy.
- Nuclear_fission wikiPageWikiLink Bohr_model.
- Nuclear_fission wikiPageWikiLink Boron.
- Nuclear_fission wikiPageWikiLink Breeder_reactor.
- Nuclear_fission wikiPageWikiLink Carnegie_Institution_for_Science.
- Nuclear_fission wikiPageWikiLink Category:Nuclear_chemistry.
- Nuclear_fission wikiPageWikiLink Category:Nuclear_physics.
- Nuclear_fission wikiPageWikiLink Category:Radioactivity.
- Nuclear_fission wikiPageWikiLink Chain_reaction.
- Nuclear_fission wikiPageWikiLink Chemical_element.
- Nuclear_fission wikiPageWikiLink Chemical_explosive.
- Nuclear_fission wikiPageWikiLink Chemical_reaction.
- Nuclear_fission wikiPageWikiLink Chicago_Pile-1.
- Nuclear_fission wikiPageWikiLink Cluster_decay.
- Nuclear_fission wikiPageWikiLink Coal.
- Nuclear_fission wikiPageWikiLink Cold_fission.
- Nuclear_fission wikiPageWikiLink Columbia_University.
- Nuclear_fission wikiPageWikiLink Coulombs_law.
- Nuclear_fission wikiPageWikiLink Critical_mass.
- Nuclear_fission wikiPageWikiLink Cusp_(singularity).
- Nuclear_fission wikiPageWikiLink Decay_chain.
- Nuclear_fission wikiPageWikiLink Decay_heat.
- Nuclear_fission wikiPageWikiLink Deuterium.
- Nuclear_fission wikiPageWikiLink Differential_equation.
- Nuclear_fission wikiPageWikiLink Edward_Teller.
- Nuclear_fission wikiPageWikiLink Einstein–Szilárd_letter.
- Nuclear_fission wikiPageWikiLink Electric_charge.
- Nuclear_fission wikiPageWikiLink Electricity_generation.
- Nuclear_fission wikiPageWikiLink Electromagnetic_radiation.
- Nuclear_fission wikiPageWikiLink Electromagnetism.
- Nuclear_fission wikiPageWikiLink Electron.
- Nuclear_fission wikiPageWikiLink Electronvolt.
- Nuclear_fission wikiPageWikiLink Electrostatics.
- Nuclear_fission wikiPageWikiLink Emilio_Segrè.
- Nuclear_fission wikiPageWikiLink Energy.
- Nuclear_fission wikiPageWikiLink Energy_density.
- Nuclear_fission wikiPageWikiLink Enriched_uranium.
- Nuclear_fission wikiPageWikiLink Enrico_Fermi.
- Nuclear_fission wikiPageWikiLink Ernest_Rutherford.
- Nuclear_fission wikiPageWikiLink Ernest_Walton.
- Nuclear_fission wikiPageWikiLink Eugene_T._Booth.
- Nuclear_fission wikiPageWikiLink Eugene_Wigner.
- Nuclear_fission wikiPageWikiLink Exothermic_reaction.
- Nuclear_fission wikiPageWikiLink Explosive_material.
- Nuclear_fission wikiPageWikiLink Exponential_decay.
- Nuclear_fission wikiPageWikiLink Fast-neutron_reactor.
- Nuclear_fission wikiPageWikiLink Fat_Man.
- Nuclear_fission wikiPageWikiLink File:Nagasakibomb.jpg.
- Nuclear_fission wikiPageWikiLink Fissile_material.
- Nuclear_fission wikiPageWikiLink Fission_(biology).
- Nuclear_fission wikiPageWikiLink Fission_products_(by_element).
- Nuclear_fission wikiPageWikiLink Force.
- Nuclear_fission wikiPageWikiLink Francis_G._Slack.
- Nuclear_fission wikiPageWikiLink Francis_Perrin.
- Nuclear_fission wikiPageWikiLink Frank_Spedding.
- Nuclear_fission wikiPageWikiLink Franklin_D._Roosevelt.
- Nuclear_fission wikiPageWikiLink Free_University_of_Berlin.
- Nuclear_fission wikiPageWikiLink Frisch–Peierls_memorandum.
- Nuclear_fission wikiPageWikiLink Fritz_Strassmann.
- Nuclear_fission wikiPageWikiLink Frédéric_Joliot-Curie.
- Nuclear_fission wikiPageWikiLink G._N._Glasoe.
- Nuclear_fission wikiPageWikiLink Gabon.
- Nuclear_fission wikiPageWikiLink Gamma_ray.
- Nuclear_fission wikiPageWikiLink Gasoline.
- Nuclear_fission wikiPageWikiLink Geologic_time_scale.
- Nuclear_fission wikiPageWikiLink George_Gamow.
- Nuclear_fission wikiPageWikiLink George_Washington_University.