Caesium
111Suboxid — Suboxide (von lat. sub = unter) sind chemische Verbindungen des Sauerstoffs zu elektropositiveren Elementen, in denen weniger Sauerstoffatome gebunden sind, als nach der Wertigkeit des Sauerstoffs zu erwarten wären. Die formale Oxidationsstufe… …
112Goiânia accident — The Goiânia accident was an incident of radioactive contamination in central Brazil that killed several people and injured many others. On September 13, 1987, an old radiation source was scavenged from an abandoned hospital in Goiânia, the… …
113Suboxide — (von lat. sub = unter) sind chemische Verbindungen des Sauerstoffs zu elektropositiveren Elementen, in denen weniger Sauerstoffatome gebunden sind, als nach der Wertigkeit des Sauerstoffs zu erwarten wären. Die formale Oxidationsstufe des anderen …
114Metallic bond — Metallic bonding is the electrostatic attractive forces between the delocalized electrons, called conduction electrons, gathered in an electron sea , and the positively charged metal ions. Understood as the sharing of free electrons among a… …
115Dirty bomb — A dirty bomb is a speculative radiological weapon that combines radioactive material with conventional explosives. The purpose of the weapon is to contaminate the area around the explosion with radioactive material, hence the attribute dirty .… …
116Photocathode — In a photomultiplier or Phototube, a photocathode is a negatively charged electrode coated with a photosensitive compound. When this is struck by light, electrons are emitted due to the photoelectric effect.Although a plain metallic cathode will… …
117Thermionic converter — A thermionic converter consists of a hot electrode which thermionically emits electrons over a potential energy barrier to a cooler electrode, producing a useful electric power output. Caesium vapor is used to optimize the electrode work… …
118Fission products (by element) — On this page, a discussion of each of the main elements in the fission product mixture from the nuclear fission of an actinide such as uranium or plutonium is set out by element. Krypton 83 86 Krypton 85 is formed by the fission process witha… …
119Isopycnic centrifugation — Isopycnic centrifugation, also known as density gradient centrifugation or equilibrium sedimentation is a technique used to separate molecules on the basis of buoyant density. (The word isopycnic means equal density .) Typically, a self… …
120Time in physics — In physics, the treatment of time is a central issue. It has been treated as a question of geometry. One can measure time and treat it as a geometrical dimension, such as length, and perform mathematical operations on it. It is a scalar quantity… …
