what is caesium 137
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cesium-137 cesium-137 (137 Cs), a radioactive material with a half-life of 30.2 years that is used in radiotherapy as a sealed source of gamma rays intended for application to various malignancies that are treated by brachytherapy.Cesium has replaced radium for such applications.See also brachytherapy. radioactive material with a half-life of 30.2 years that is used in radiotherapy as a sealed source of gamma rays intended for application to various malignancies that are treated by brachytherapy. Cesium has replaced radium for such applications. See also brachytherapy.
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Selenium Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. It rarely occurs in its elemental state in nature, or as pure ore compounds.elenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. It rarely occurs in its elemental state in nature, or as pure ore compounds.
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Caesium-137 Cs-137 γ-spectrum. Caesium-137 has a half-life of about 30.17 years. About 95 percent decays by beta emission to a metastable nuclear isomer of barium: barium-137m (137m Ba, Ba-137m).
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Silicon Bronze C65500 Silicon Bronze C65500. Farmer’s Copper Ltd. inventories a large amount of Silicon Bronze C65500 in plate, sheet, rod, pipe, and fittings. It’s high-strength, corrosion resistance, and resilience and formability makes silicon bronze among the most widely used copper alloys.C655 is corrosion resistant against most acids, alkalies, salts and organic chemicals.t’s high-strength, corrosion resistance, and resilience and formability makes silicon bronze among the most widely used copper alloys.
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Cobalt Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt in the Earth's crust is found only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
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- Rutherfordium is a solid metal that has an atomic number of 104. It is a transition metal, as well as a synthetic element. Because this element is fairly new and made within the laboratory, it has no current use within our society today.
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Uranium-238 Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature, making up over 99% of it. Unlike uranium-235 it is non-fissile, which means it cannot sustain a chain reaction. However, it is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239.
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- What is Plutonium-238? National Aeronautics and Space Administration What is plutonium? • Plutonium is a metallic chemical element with a silvery-white color. The plutonium used on NASA spacecraft is transformed in a laboratory into a silvery-black ceramic material called plutonium dioxide. Plutonium-238 is a special material that emits steady heat due to its natural radioactive decay. Several unique features of plutonium-238 have made it the material of choice to help produce electrical power for more than two-dozen U.S. space missions that have been enabled by radioisotope power systems (RPS).
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- Inconel 718 behaves as a spin glass. Its susceptibility reaches a maximum between 15 and 19 K, near the liquid hydrogen boiling point, 20 K. The susceptibility increases by an order of magnitude as the iron content increases by 1.2% and the nickel content decreases by 1.5%. The nominal composition is 12–20% iron and 50–55% nickel. Inconel 625, which contains about 4% iron, was paramagnetic. Inconel 600 exhibited spin glass properties below 6 K, short-range ferromagnetism between 6 and 92 K, and paramagnetism above 92 K.
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Cesium Cesium-137 is radioactive and may be used for radiation therapy to treat certain cancers. Space travel engineers have discovered that burning cesium in space is a very efficient form of fuel. It is determined to be 140 times more efficient than any other fuel.
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Chernobyl Nuclear Accident Deposition of radioactive caesium in Europe as a result of the Chernobyl accident. For 10 days following the April 26 explosion, the ruptured Chernobyl reactor continued to release major quantities of radioactive substances, amounting to a total of about 14 EBq.lutonium and its decay products (in particular americium-241) will remain in the environment over a longer term of hundreds to thousands of years though at low levels (see half-lives of radioisotopes emitted during the Chernobyl accident).
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SELENIUM Overview. Selenium is a member of the chalcogen family. The chalcogens are elements in Group 16 (VIA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to one another. Other chalcogens are oxygen, sulfur, tellurium, and polonium. The name chalcogen comes from the Greek word chatkos, meaning ore.. The first two members of the family, oxygen and sulfur, are found in most ores.
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- Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table.Controversy about silicon's character dates to its discovery; it was first prepared and characterized in pure form in 1823.he isotopes of silicon range in mass number from 22 to 44. The most common decay mode of six isotopes with mass numbers lower than the most abundant stable isotope, silicon-28, is β+ , primarily forming aluminium isotopes (13 protons) as decay products.
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Radium 226 Ra is the most stable isotope of radium and is the last isotope in the (4 n + 2) decay chain of uranium-238 with a half-life of over a century. Its immediate decay product is the dense radioactive noble gas radon, which is responsible for much of the danger of environmental radium.adium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals.
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Caesium Caesium is a relatively rare element as it is estimated to average approximately 3 parts per million in the Earth's crust. This makes it the 45th most abundant of all elements and the 36th of all the metals.
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CESIUM Cesium is a member of the alkali family, which consists of elements in Group 1 (IA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. The alkalis include lithium, sodium, potassium, rubidium, and francium. Cesium is considered the most active metal.esium is a member of the alkali family, which consists of elements in Group 1 (IA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. The alkalis include lithium, sodium, potassium, rubidium, and francium. Cesium is considered the most active metal.
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Long half-life â  dangerous Cs-135 has a half-life of 2.3 million years and emits beta particles with an energy of 267 keV. Cs-137 has a half-life of 30 years and emits beta particles with an energy of 605000 keV. If you stood next to a million atoms of Cs-137 for a year 22840 atoms would decay, for a total energy release of 2.2 nanojoules.
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Cobalt Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
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Radium 226 Ra is the most stable isotope of radium and is the last isotope in the (4 n + 2) decay chain of uranium-238 with a half-life of over a century. Its immediate decay product is the dense radioactive noble gas radon, which is responsible for much of the danger of environmental radium.
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Inconel 718 Inconel® 718 is a nickel-chromium, precipitation hardening alloy that can maintain good ductility and high strength up to 1300°F. Inconel 718 has relatively good formability, weldability and excellent cryogenic properties compared to other PH nickel alloys.In addition, this alloy can be readily welded w/out hardening or cracking. Inconel 718 is non-magnetic and has good oxidation and corrosion resistance in aerospace applications.Michlin offers Inconel 718 per AMS 5662 (capable of) 5663 in round bar. In addition, 718 is offered in plate, sheet, pipe, tube, flat bar and coil. Call today for any Inconel material needs.nconel 718 has relatively good formability, weldability and excellent cryogenic properties compared to other PH nickel alloys. In addition, this alloy can be readily welded w/out hardening or cracking. Inconel 718 is non-magnetic and has good oxidation and corrosion resistance in aerospace applications.
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- Radon-222 is a natural, radioactive isotope of element number 86, that. occurs in the uranium-238 decay chain (see table 1). Its immediate parent is. radium-226, and radon-222 itself decays by alpha particle emission through a. series of short-lived decay products (mainly isotopes of polonium, lead and.
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- Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, fifth-most-abundant element by mass in the Earth 's crust. The ion Ca 2+ is also the fifth-most-abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.Free calcium metal is too reactive to occur in nature. Calcium stearate (Ca(C 18 H 35 O 2) 2) is used in the manufacture of wax crayons, cements, certain kinds of plastics and cosmetics, as a food additive, in the production of water resistant materials and in the production of paints.
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Plutonium Both plutonium-239 and plutonium-241 are fissile, meaning that they can sustain a nuclear chain reaction, leading to applications in nuclear weapons and nuclear reactors. Plutonium-240 exhibits a high rate of spontaneous fission, raising the neutron flux of any sample containing it.lutonium-238 has a half-life of 88 years and emits alpha particles. It is a heat source in radioisotope thermoelectric generators, which are used to power some spacecraft.
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- Caesium is a soft, gold-coloured metal that is quickly attacked by air and reacts explosively in water. Uses. The most common use for caesium compounds is as a drilling fluid. They are also used to make special optical glass, as a catalyst promoter, in vacuum tubes and in radiation monitoring equipment. One of its most important uses is in the ‘caesium clock’ (atomic clock).
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CESIUM The heat produced by nuclear fission can be converted into electricity. While this process is going on, cesium-137 is being produced as a by-product. That cesium-137 can be collected and used for a number of applications. As an example, cesium-137 can be used to monitor the flow of oil in a pipeline. In many cases, more than one oil company may use the same pipeline.
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Tellurium Tellurium is a chemical element with symbol Te and atomic number 52. A brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur.It is occasionally found in native form, as elemental crystals. Tellurium is far more common in the universe as a whole than it is on Earth.aturally occurring tellurium has eight isotopes. Five of those isotopes, 122 Te, 123 Te, 124 Te, 125 Te and 126 Te, are stable. The other three, 120 Te, 128 Te and 130 Te, have been observed to be radioactive.