Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Caesium-137 is a radioactive isotope of caesium which is formed mainly as a fission product by nuclear fission. It has a half-life of about 30.1 years, and decays by beta emission to a metastable nuclear isomer of barium-137: barium-137m (137mBa, Ba-137m). (About 95 percent of the nuclear decay leads to this isomer. The other 5.0 percent directly populates the ground...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Caesium-137 is a radioactive isotope of caesium which is formed mainly as a fission product by nuclear fission. It has a half-life of about 30.1 years, and decays by beta emission to a metastable nuclear isomer of barium-137: barium-137m (137mBa, Ba-137m). (About 95 percent of the nuclear decay leads to this isomer. The other 5.0 percent directly populates the ground state, which is stable.) Ba-137m has a half-life of about 2.55 minutes, and it is responsible for all of the emissions of gamma rays. One gram of cesium-137 has an activity of 3.4 terabecquerel (TBq).
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