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La transformation radioactive
Pauli suggested in his humorous way, in a letter dated December , the possible existence of a neutral and very light particle Remember that in the actual neutron, a component of the nucleus, had not yet been discovered this would be in In , as part of project Poltergeist at the laboratory, Savanah River, South , Cowan and Reines Nobel Prize in Physics, designed a nuclear reaction to detect the production of 2 to 3 neutrinos per hour: and the hypothesis of Pauli was verified. Cosmic radiation has resulted in the existence of a new variety of neutrinos, associated with the muon, known as muon neutrinos. The problem of neutrinos is their undetectable nature: the absence of interaction they have with matter makes them difficult to catch. On 23rd February , the observed explosion of the supernova SN, in the large Magellanic Cloud, enabled the detection of 11 neutrinos in 13 seconds completely unusual output at the Super-Kamiokande Observatory, Japan, out of the emitted in all directions by the stellar explosion. It is now impossible for us to detect up to 1. This text leads us through the saga, from the hypothesis in , the first verifications in and up to the supernova in
Radioactive Change La transformation radioactive , E. Rutherford et F. Virginie Emsellem, in P. Il est auteur ou co-auteur de nombreux ouvrages scientifiques et de sites Internet www. Ils doivent maintenant examiner la nature des transformations qui produisent ces nouveaux corps :.