Cesium is a golden yellow metal , low melting point of an active metal , easily oxidized in air and can react violently with water to produce hydrogen and explosion. Without cesium elemental form in nature , cesium salt rarely distributed in the form of land and sea . Cesium also to create a vacuum components , optical tube and other important materials . Radionuclide Cs-137 is Japan's Fukushima Daiichi nuclear power plant leaked radioactive contamination in one.
Chemical properties
Isotope Cs-137:
Biological behavior of cesium and potassium similar edible creatures containing soluble compounds of cesium-137 after 24 hours , cesium-137 can be fully absorbed by the body and combine within the cell , causing internal exposure .
Cesium-137 can be used as γ radiation source for radiation breeding, storage of food irradiation , sterilization of medical devices , as well as cancer treatment testing and other industrial equipment γ . Because the half-life of cesium source and could easily lead to a longer diffusion weaknesses , so cesium-137 source has been gradually replaced by cobalt-60 source .
March 29, 2011 , in Anhui , Guangdong, Guangxi Zhuang Autonomous Region and Ningxia Hui Autonomous Region of monitoring points aerosol sampling also detected a trace amount of artificial radionuclides cesium -137 and cesium-134 , and its concentration in 10-5 Bq / m magnitude and below . Environment, cesium-137 easily absorbed into the body , evenly distributed in the body ; due to release of cesium-137 γ -rays easily measured in vitro . Into the main body of radioactive cesium stranded soft tissue in the body , particularly in muscle , bone and fat in low concentrations ; relatively large amount of radioactive cesium ingested can cause acute and chronic injury .
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From:Metal oxide materials
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