![]() ![]() Just like potassium, cesium belongs to the alkali metals and is the most ignoble and therefore most reactive element of this group. It is mainly formed by neutron capture on the stable Cs-133 in nuclear reactors, while it is only formed in traces in atomic bomb explosions. Cs-134 decays with a physical half-life of 2.1 years with the emission of beta and gamma rays. (1967) Half-life 11018.30 days = 30.187 yearsĬesium-137 has a long half-life of 30.19 years based on a human life span, while the activity of iodine-131, for example, is halved within 8 days due to radioactive decay.įrom a radiobiological point of view, besides Cs-137, cesium-134 is also of less importance. 1: Decay scheme of caesium-137, after LEDERER et al. The decay scheme of the nuclide is shown in the figure 1 Fig. With a fission yield of 6.2%, it is produced in relatively large quantities in atomic bomb explosions (KATCOFF 1958) and, with a physical half-life of about 30 years, remains in the environment over the long term. *=valid for total cesium (Cs-134 + Cs-137) Radiocesium: Cesium 137 is relevant for radiation biologyįrom a radiobiological point of view, Cs-137 is the most important Cs isotope. Here are some important facts at a glance Caesium 137 Resonance frequency norm in atomic clocks.Global supremacy cannot be achieved without these metals.Cesium 133 (Cs 133) a strategically important metal in the high tech age.Global warming and dynamics of cesium 137.Limit values 370 Bq / kg or 600 Bq / kg.Radiocesium: Cesium 137 is relevant for radiation biology. ![]()
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