Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Helium-3> ?p ?o }
- Helium-3 abstract "Helium-3 (He-3, also written as 3He) is a light, non-radioactive isotope of helium with two protons and one neutron, in contrast with two neutrons in common helium. Its hypothetical existence was first proposed in 1934 by the Australian nuclear physicist Mark Oliphant while he was working at the University of Cambridge Cavendish Laboratory. Oliphant had performed experiments in which fast deuterons collided with deuteron targets (incidentally, the first demonstration of nuclear fusion). Helium-3 was thought to be a radioactive isotope until helions were also found in samples of natural helium, which is mostly helium-4, taken both from the terrestrial atmosphere and from natural gas wells.Helium-3 occurs as a primordial nuclide, escaping from the Earth's crust into the atmosphere and into outer space over millions of years. Helium-3 is also thought to be a natural nucleogenic and cosmogenic nuclide, one produced when lithium is bombarded by natural neutrons. Those are released by spontaneous fission and by nuclear reactions with cosmic rays. Some of the helium-3 found in the terrestrial atmosphere is also a relic of atmospheric and underwater nuclear weapons testing. Most of this comes from the decay of tritium (hydrogen-3), which decays into helium-3 with a half life of 12.3 years. Furthermore, some nuclear reactors (landbound or shipbound) periodically release some helium-3 and tritium into the atmosphere. The nuclear reactor disaster at Chernobyl released a huge amount of radioactive tritium into the atmosphere, and smaller accidents have caused smaller releases. Furthermore, significant amounts of tritium and helium-3 have been deliberately produced in national arsenal nuclear reactors by the irradiation of lithium-6. The tritium is used to \"boost\" nuclear weapons, and some of this inevitably escapes during its production, transportation, and storage. Hence, helium-3 enters the atmosphere both through its direct release and through the radioactive decay of tritium.The abundance of helium-3 is thought to be greater on the Moon than on Earth, having been embedded in the upper layer of regolith by the solar wind over billions of years, though still lower in quantity than in the solar system's gas giants.".
- Helium-3 thumbnail He-3_atom.png?width=300.
- Helium-3 wikiPageExternalLink fdm967.pdf.
- Helium-3 wikiPageExternalLink presentation-speech.html.
- Helium-3 wikiPageExternalLink moonsale.
- Helium-3 wikiPageExternalLink 29_challengestoheliumsupply111003.pdf.
- Helium-3 wikiPageID "14380".
- Helium-3 wikiPageLength "46910".
- Helium-3 wikiPageOutDegree "228".
- Helium-3 wikiPageRevisionID "707863730".
- Helium-3 wikiPageWikiLink Activation_product.
- Helium-3 wikiPageWikiLink Alkali_metal.
- Helium-3 wikiPageWikiLink Alpha_decay.
- Helium-3 wikiPageWikiLink Alpha_particle.
- Helium-3 wikiPageWikiLink Aneutronic_fusion.
- Helium-3 wikiPageWikiLink Angular_momentum.
- Helium-3 wikiPageWikiLink Anthony_James_Leggett.
- Helium-3 wikiPageWikiLink Asthma.
- Helium-3 wikiPageWikiLink Atmosphere_of_Earth.
- Helium-3 wikiPageWikiLink Atomic_mass_unit.
- Helium-3 wikiPageWikiLink Azimuthal_quantum_number.
- Helium-3 wikiPageWikiLink BCS_theory.
- Helium-3 wikiPageWikiLink Beta_decay.
- Helium-3 wikiPageWikiLink Boron.
- Helium-3 wikiPageWikiLink Bose–Einstein_condensate.
- Helium-3 wikiPageWikiLink Boson.
- Helium-3 wikiPageWikiLink British_Interplanetary_Society.
- Helium-3 wikiPageWikiLink CANDU_reactor.
- Helium-3 wikiPageWikiLink Caesium.
- Helium-3 wikiPageWikiLink Capital_(economics).
- Helium-3 wikiPageWikiLink Category:Isotopes_of_helium.
- Helium-3 wikiPageWikiLink Category:Nuclear_fusion_fuels.
- Helium-3 wikiPageWikiLink Cavendish_Laboratory.
- Helium-3 wikiPageWikiLink Chandrayaan-1.
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- Helium-3 wikiPageWikiLink Chinese_Academy_of_Sciences.
- Helium-3 wikiPageWikiLink Chinese_Lunar_Exploration_Program.
- Helium-3 wikiPageWikiLink Chronic_obstructive_pulmonary_disease.
- Helium-3 wikiPageWikiLink Circular_polarization.
- Helium-3 wikiPageWikiLink Cold_War.
- Helium-3 wikiPageWikiLink Cooper_pair.
- Helium-3 wikiPageWikiLink Cosmic_ray.
- Helium-3 wikiPageWikiLink Cosmochemistry.
- Helium-3 wikiPageWikiLink Cosmogenic_nuclide.
- Helium-3 wikiPageWikiLink Coulomb_barrier.
- Helium-3 wikiPageWikiLink Critical_point_(thermodynamics).
- Helium-3 wikiPageWikiLink Cryogenics.
- Helium-3 wikiPageWikiLink Cystic_fibrosis.
- Helium-3 wikiPageWikiLink David_Lee_(physicist).
- Helium-3 wikiPageWikiLink Dense_plasma_focus.
- Helium-3 wikiPageWikiLink Deuterium.
- Helium-3 wikiPageWikiLink Dilution_refrigerator.
- Helium-3 wikiPageWikiLink Douglas_Osheroff.
- Helium-3 wikiPageWikiLink Electric_generator.
- Helium-3 wikiPageWikiLink Electricity.
- Helium-3 wikiPageWikiLink Electronvolt.
- Helium-3 wikiPageWikiLink Electrostatics.
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- Helium-3 wikiPageWikiLink Fermion.
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- Helium-3 wikiPageWikiLink Geochemistry.
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- Helium-3 wikiPageWikiLink Half-life.
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- Helium-3 wikiPageWikiLink Helion_(chemistry).
- Helium-3 wikiPageWikiLink Helium.
- Helium-3 wikiPageWikiLink Helium-3_refrigerator.
- Helium-3 wikiPageWikiLink Helium-4.
- Helium-3 wikiPageWikiLink Hotspot_(geology).
- Helium-3 wikiPageWikiLink Hydrogen_atom.
- Helium-3 wikiPageWikiLink Hyperpolarization_(physics).
- Helium-3 wikiPageWikiLink ITER.
- Helium-3 wikiPageWikiLink Indian_Space_Research_Organisation.
- Helium-3 wikiPageWikiLink Inertial_confinement_fusion.
- Helium-3 wikiPageWikiLink Interplanetary_dust_cloud.
- Helium-3 wikiPageWikiLink Investment.
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- Helium-3 wikiPageWikiLink Isotope.
- Helium-3 wikiPageWikiLink Isotopes_of_helium.
- Helium-3 wikiPageWikiLink Isotopes_of_lithium.
- Helium-3 wikiPageWikiLink Joule_per_mole.
- Helium-3 wikiPageWikiLink Jupiter.
- Helium-3 wikiPageWikiLink Kelvin.
- Helium-3 wikiPageWikiLink Kilowatt_hour.
- Helium-3 wikiPageWikiLink Lithium.
- Helium-3 wikiPageWikiLink Magnetic_confinement_fusion.
- Helium-3 wikiPageWikiLink Mantle_(geology).
- Helium-3 wikiPageWikiLink Mark_Oliphant.
- Helium-3 wikiPageWikiLink Mid-ocean_ridge.
- Helium-3 wikiPageWikiLink Mole_(unit).
- Helium-3 wikiPageWikiLink Moon.
- Helium-3 wikiPageWikiLink National_Ignition_Facility.
- Helium-3 wikiPageWikiLink Natural_gas.
- Helium-3 wikiPageWikiLink Neutron.
- Helium-3 wikiPageWikiLink Neutron_detection.
- Helium-3 wikiPageWikiLink Neutron_radiation.