![]() ![]() The effective dose received in a typical chest X-ray examination is about 0.05 mSv. ![]() A radiation worker may legally receive up to 20 mSv per year. The annual dose received by a member of the public in Hong Kong from natural background radiation is about 2 mSv. This is a very large unit and submultiples, in particular, the millisievert (mSv - one thousandth of a sievert) are commonly used. The effective dose is frequently abbreviated to dose. Article Xenon-133 and caesium-137 releases into the atmosphere from the Fukushima Dai-ichi nuclear power plant: determination of the source term, atmospheric. gas xenon-133 (133Xe) and the aerosol-bound caesium-137 (137Cs), which have very different release characteristics as well as behavior in the atmosphere. The effective dose is a single number broadly representing the risk to health taking into consideration the susceptibility to harm of different tissues and weighted for the harmfulness of different types of radiation. To put all ionising radiation on an equal basis with regard to the potential for causing harm, a quantity known as effective dose is introduced. Dose and Sievert - The effect of radiation on any material is determined by the "dose" of radiation that material receives. Isotopes of an element can be classified as radioisotopes (those undergoing decay with the emission of characteristic radiation) or stable isotopes. Different isotopes have the same chemical properties, but somewhat different physical properties. ![]() More: Caesium-137 is one of the major radioactive. Atoms of an element having the same number of protons but different number of neutrons in the nuclei. The amounts of radiation from fallout caesium-137 in the bodies of a number of people in a heavily populated region have been measured and an estimate made of the amounts likely to be received in. In spite of long term period after Chernobyl fallout (25 years after the accident) the level of Cs-137 in soils of contaminated landscapes remains several. Caesium is one of the radioactive fission products created within a nuclear reactor during its operation. ![]()
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