How To Use Thorium In A Sentence
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The precipitate is thorium oxalate, which is washed with hot water, dried, and ignited.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
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In addition to the reserves in already established environments, there remains another category, as yet unevaluated, of potential reserves of both thorium and uranium in minor accessory minerals of alkalic igneous rocks and carbonatites (intrusive limestones) which are widespread in western United States.
Nuclear Energy and the Fossil Fuels (historical)
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Nuclear fuel, ie uranium and potentially thorium, is incredibly abundant and currently inexpensive.
Coyote Blog » Blog Archive » Should We Take Another Shot at Nuclear Power?
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Considerable work, guided by the theory of radioactive transformations, has led to approximately 30 new radioactive elements being envisaged, classified in 4 series according to the primary substance: these series are uranium, radium, thorium and actinium.
Marie Curie - Nobel Lecture
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Hahn diligently amassed this radioactive material by collecting small amounts from household products, such as americium from smoke detectors, thorium from camping lantern mantles, radium from clocks and tritium (as neutron moderator) from gun-sights.
Greensboring® Greensboro, NC
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We can tell how the elements of high atomic weight, such as uranium and thorium, are constantly giving off particles and are thus by loss or decomposition being changed over into other elements, such as radium, niton, polonium and lead.
Q. E. D., or New Light on the Doctrine of Creation
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Helium is also made by radioactive decay of uranium and thorium, both of which decay by emission of alpha particles.
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Similar damage is caused by the alpha recoil, which is a trace of the energy released during the alpha decay of uranium and thorium isotopes.
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If the metal thorium is exposed in a reactor to neutron bombardment, it may be transformed into a fissionable isotope of uranium having a mass 233.
The Peacetime Applications of Atomic Energy
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Hahn's radiothorium and actinium salts also followed him to Emil Fischer's laboratory in Berlin. 30
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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Total gamma-ray relates to the natural gamma radioactivity of a sample as determined by the concentration of radioactive isotopes of uranium, thorium and potassium.
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I've read the Los Alamos reports, but I'd like to know if, since then anyone has said the thorium is more concentrated than being a constituent of KREEP overturned at basin rim structures.
Dennis Wingo - Why Space? Why Now? - NASA Watch
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This is measured either by directly counting the alpha, beta and gamma radiations from the sample, or by making chemical measurements of the concentration of uranium, thorium and potassium and calculating the dose rate.
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With Ramsay's consent, Hahn had taken with him the radiothorium he separated from samples of barium chloride and the actinium that he and a collaborator had earlier proved to be identical to the new element that the German chemist Friedrich Giesel had named emanium.
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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Uranium decays radioactively to produce thorium - 230 at a known rate.
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Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
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Other radioactive elements have been discovered since: actinium (Debierne), radiothorium and mesothorium (Hahn), ionium (Boltwood), etc.
Marie Curie - Nobel Lecture
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There are fifteen actinoid (rare earth) elements from which fissile isotopes can be produced; uranium and thorium are the only naturally occurring actinoids.
Dissident Voice
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Since gas mantles made with thorium are radioactive, their use has been phased out.
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The Thorium versus Potassium cross-plot confirms illite as being the main clay and kaolinite as the secondary clay mineral.
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Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
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The Thorium versus Potassium cross-plot confirms illite as being the main clay and kaolinite as the secondary clay mineral.
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I can only refer in passing here to the large amount of work done by various experimenters in analysing the long series of transformations of radium and thorium and actinium; the linking up of radium with uranium and the discovery by Boltwood of the long looked-for and elusive parent of radium, viz. ionium.
Ernest Rutherford - Nobel Lecture
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Her experiments with synthetic chalcolite, the study of all chemical compounds of uranium and thorium, and the testing of all known chemical elements and certain minerals all occurred in this early period.
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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That's radioactive, but it takes two million years before it becomes protoactinium, which changes to uranium in twenty-seven days, which changes to thorium after a hundred and sixty thousand years, which changes to radium, then to actinium, then to --
Asimov's Science Fiction
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Chemical separation and purification of uranium-233 from thorium and plutonium-239 from uranium require far less effort than enrichment of isotopes.
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The concentrations of iron and thorium, for instance, have proved useful in distinguishing rock types from one another and in monitoring geochemical processes.
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Other radioactive elements have been discovered since: actinium (Debierne), radiothorium and mesothorium (Hahn), ionium (Boltwood), etc.
Marie Curie - Nobel Lecture
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Among the commonly known alpha emitters are various isotopes of polonium, radium, thorium, uranium and all of the transuranium elements.
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Get ready for thorium, the supersafe, green and clean, massively abundant fuel of the future.
Wired Top Stories
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Thorium oxide (ThO2), also called thoria, has one of the highest melting points of all oxides (3300°C).
Thorium
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But an unexpected fact was noted: certain minerals (pitchblende, chalcolite, autunite) had a greater activity than might be expected on the basis of their uranium or thorium content.
Marie Curie - Nobel Lecture
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MacKay said the MSR is another design that looks very interesting and I think the first prototype will probably get built in the USA in the next few years, if the thorium advocates over there are successful - and I'm going to be very interested to see how it works.
The Guardian World News
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I also built a transistorized Geiger counter to perform experiments with a radioactive sample of 0.1 millicurie of Mesothorium which
Theodor W. Hänsch - Autobiography
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These are mostly mined for the rare earths; the thorium is a low-value waste product.
Dennis Wingo - Why Space? Why Now? - NASA Watch
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I've read the Los Alamos reports, but I'd like to know if, since then anyone has said the thorium is more concentrated than being a constituent of KREEP overturned at basin rim structures.
Dennis Wingo - Why Space? Why Now? - NASA Watch
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Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
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Nuclear power from fusion might one day be an especially promising field, as may be the use of the radioactive chemical element thorium, which is more abundant than uranium and awaits harnessing.
Post-Carbon America
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When a stalactite or stalagmite is deposited it contains a large amount of uranium and no thorium because of differences in the chemical behaviour of these elements.
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A piglike animal was painted almost 36,000 years ago, on the basis of uraniumthorium dating of overlying lime deposits.
Times, Sunday Times
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Thorium and uranium, for instance, are forged in the heat of a supernova, and barium and bismuth via the capture of neutrons within red giant stars.
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(Presumably, the need for a license is a matter of degree, given that our own bodies contain radioactive potassium-40, and given that the walls of most buildings contain the radioactive isotopes from the natural uranium-238 and thorium-232 decay chains).
Archive 2009-04-01
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Along the road to bismuth, a number of extremely high energy or otherwise dangerous alpha emitters will be present in the sample in small quantities: radium, actinium, thorium, francium, pollonium and radioactive lead, among others.
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The light water breeder reactor (LWBR) concept was also successfully tested here from 1977 to 1982 with thorium and 233U fuel clad with zircaloy using the 'seed/blanket' concept.
Thorium
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For the next two years, they continued to copublish on the atomic weights of uranium, thorium, and ionium. 86 In addition, their research showed that ionium was not a separate element but just an isotope of thorium.
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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The first four actinide elements, actinium, thorium, protactinium and uranium are naturally occurring and have been known for a considerable time.
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I also built a transistorized Geiger counter to perform experiments with a radioactive sample of 0.1 millicurie of Mesothorium which
Theodor W. Hänsch - Autobiography
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Following the discovery of artificial radioactivity by M and Mme. Joliot-Curie and the use of neutrons by Fermi for atomic nuclear processes, Hahn again collaborated with Professor Meitner and afterwards with Dr. Strassmann on the processes of irradiating uranium and thorium with neutrons.
Otto Hahn - Biography
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Titanium is found in column four along with chemically similar zirconium, hafnium, and thorium.
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Smoke detectors, he learned, contain small amounts of a radio-active element called americium, while camping lanterns contain thorium.
CNN.com
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The Atomic Energy Commission is concerned mainly with fundamental research work at the universities and in the Tata Institute of Fundamental Research in Bombay and with problems associated with the discovery of uranium and the processing of thorium from the huge monazite sand deposits of southern India.
Atom and Empire
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In addition to primeval heat, Earth's core also gets heat from radioactive decay of uranium, thorium, and potassium.
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Processing the risk of radiation leaks , and disposing the radioactive thorium is difficult and costly.
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Thus were found the mesothorium now used by physicians and manufactured industrially, radio-thorium, ionium, protoactinium, radio-lead, and other substances.
Pierre Curie
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But a large region of rugged highlands on the far side, as well as heavily cratered patches on the near side, are poor in both iron and thorium.
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Alloyed thorium enhances the emission of thermions by lowering the work function barriers.
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The Thorium versus Potassium cross-plot confirms illite as being the main clay and kaolinite as the secondary clay mineral.
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The Thorium versus Potassium cross-plot confirms illite as being the main clay and kaolinite as the secondary clay mineral.
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Thus were found the mesothorium now used by physicians and manufactured industrially, radio-thorium, ionium, protoactinium, radio-lead, and other substances.
Pierre Curie
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All natural rocks contain small amounts of uranium and thorium, which are radioactive and remain so for billions of years.
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But an unexpected fact was noted: certain minerals (pitchblende, chalcolite, autunite) had a greater activity than might be expected on the basis of their uranium or thorium content.
Marie Curie - Nobel Lecture
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The dates of discovery of these elements as 1789 for uranium, 1829 for thorium, 1899 for actinium and 1913 for protactinium.
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I needed thorium, and northing but thorium, and went from Shattrath to Orgrimmar to Ferales to Silithus to Un'Goro Crater.
"...help can't even help us."
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In order to be a near-term justification, lunar thorium needs to be minable by something other than bulk processing of the regolith.
Dennis Wingo - Why Space? Why Now? - NASA Watch
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Let it suffice to call to mind how it proved possible to produce from certain thorium minerals lead with precisely the same chemical properties as ordinary lead, but with considerably higher atomic weight - that is to say, an isotope to lead.
Nobel Prize in Chemistry 1921 - Presentation Speech
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The analysis shows that manganese, titanium, hafnium, thorium, phosphorus, and the rare-earth elements play a significant role in discriminating between zircons of various origins.
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Deep within Earth, some diamonds come into contact with radioactive materials, such as thorium or uranium, that can impart a unique signature known as a radiation halo.
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A proposal was patented for a ceramic block pessary using radioactive elements such as thorium, actinium and even radium.
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Metallic thorium is brittle and almost infusible; the powder takes a metallic luster under pressure, is permanent in the air at temperatures up to 120°, takes fire below a red heat either in air or oxygen, and burns with a dazzling luster, leaving
Scientific American Supplement, No. 365, December 30, 1882
