New research shows that most of the radioactive fallout which landed on downtown Tokyo a few days after the Fukushima accident was concentrated and deposited in non-soluble glass microparticles, as a type of 'glassy soot'. ...
Environment
Jun 27, 2016
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An international consortium of scientists has refined the map of cesium and plutonium radionuclide concentrations in soils in Switzerland and several neighboring countries. Using an archive of European soil samples, the team ...
Environment
Jul 16, 2020
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397
Tokyo Electric Power Co. Saturday halted an operation to clean highly contaminated waste water at a crippled Japanese nuclear plant due to higher-than-expected radiation levels.
Energy & Green Tech
Jun 18, 2011
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Environmental group Greenpeace warned Thursday that marine life it tested more than 20 kilometres (12 miles) off Japan's stricken Fukushima nuclear plant showed radiation far above legal limits.
Environment
May 26, 2011
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1
Farmland in parts of Japan is no longer safe because of high levels of radiation in the soil, scientists have warned, as the country struggles to recover from the Fukushima atomic disaster.
Environment
Nov 15, 2011
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Sensors collect certain parameters such as temperature and air pressure in their proximity. Physicists from Kaiserslautern and a colleague from Hanover have succeeded for the first time in using a single cesium atom as a ...
Quantum Physics
Feb 4, 2020
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317
A fresh leak of radioactive water into the open ocean has been discovered at Japan's crippled Fukushima nuclear complex, its operator said Monday as cleanup efforts continued.
Environment
Dec 5, 2011
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A pair of greenlings have shown the highest level of radioactive caesium detected in fish and shellfish caught in waters off Japan's crippled Fukushima nuclear power plant, its operator said Tuesday.
Environment
Aug 21, 2012
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High levels of radioactive contamination have been found in soil in the capital of Japan's Fukushima prefecture, a study showed Wednesday, prompting calls to make the area a voluntary evacuation zone.
Environment
Oct 5, 2011
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The testes and sperm count of bulls abandoned in the evacuation zone around the battered Fukushima nuclear plant were not affected by chronic exposure to radiation, a Japanese academic study has found.
Environment
Oct 9, 2013
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Caesium or cesium ( /ˈsiːziəm/ see-zee-əm) is the chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (82 °F), which makes it one of only five elemental metals that are liquid at (or near) room temperature. Caesium is an alkali metal and has physical and chemical properties similar to those of rubidium and potassium. The metal is extremely reactive and pyrophoric, reacting with water even at −116 °C (−177 °F). It is the least electronegative element that has stable isotopes, of which it has only one, caesium-133. Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors.
Two German chemists, Robert Bunsen and Gustav Kirchhoff, discovered caesium in 1860 by the newly developed method of flame spectroscopy. The first small-scale applications for caesium have been as a "getter" in vacuum tubes and in photoelectric cells. In 1967, a specific frequency from the emission spectrum of caesium-133 was chosen to be used in the definition of the second by the International System of Units. Since then, caesium has been widely used in atomic clocks.
Since the 1990s, the largest application of the element has been as caesium formate for drilling fluids. It has a range of applications in the production of electricity, in electronics, and in chemistry. The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology. Although the element is only mildly toxic, it is a hazardous material as a metal and its radioisotopes present a high health risk in case of radiation leaks.
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