NEUTRON — En 1932, James Chadwick montra que le rayonnement émis par des atomes de béryllium bombardés par des particules 見 est constitué d’objets qui sont dépourvus de charge électrique et dont leur masse est proche de celle du proton. Ces objets furent… … Encyclopédie Universelle
Neutron absorber — Neutron absorbers are isotopes of certain elements that absorb free neutrons creating heavier isotopes of the same element. The most prolific neutron absorbers are elements that become stable by absorbing a neutron such as xenon 135 (Xe 135, half … Wikipedia
Cadmium tungstate — (CdWO4 or CWO) is a dense, chemically inert solid which is used as a scintillation crystal to detect gamma rays. It has density of 7.9 g/cm3 and melting point of 1325 °C. It is toxic if inhaled or swallowed. Its crystals are transparent,… … Wikipedia
Cadmium-113m — is a Cadmium radioisotope and nuclear isomer with a halflife of 14.1 years. In a normal thermal reactor, it has a very low fission product yield, plus its large neutron capture cross section means that most of even the small amount produced is… … Wikipedia
Neutron capture — Science with Neutrons Foundations Neutron temperature Flux · Radiation … Wikipedia
Neutron activation analysis — Science with Neutrons Foundations Neutron temperature Flux · Radiation … Wikipedia
neutron capture — ▪ physics type of nuclear reaction in which a target nucleus absorbs a neutron (uncharged particle), then emits a discrete quantity of electromagnetic energy (gamma ray photon). The target nucleus and the product nucleus are isotopes, or… … Universalium
Startup neutron source — RBMK reactor control rod positions at the moment of the Chernobyl disaster; blue=startup neutron sources (12), yellow=shortened control rods from the reactor bottom (32), grey=pressure tubes (1661), green=control rods (167), red=automatic control … Wikipedia
Super-Neutron — Infobox Short story name = Super Neutron title orig = translator = author = Isaac Asimov country = United States language = English series = genre = Science fiction short story publication type = Periodical published in = Astonishing Stories… … Wikipedia
Control rod — PWR control rod assembly, above fuel element A control rod is a rod made of chemical elements capable of absorbing many neutrons without fissioning themselves. They are used in nuclear reactors to control the rate of fission of uranium and… … Wikipedia
Indium — Not to be confused with Iridium. cadmium ← indium → tin Ga ↑ In ↓ Tl … Wikipedia