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Search Results: Ultracold neutrons

The lifetime of a free neutron (which beta-decays into a proton, an electron, and an antineutrino) is an important parameter for understanding both...


= Encyclopedia Article; = Research Update
The neutron beam enters from the left, it is collimated, and unscattered neutrons are absorbed in the materials surrounding the trapping region. Neutrons scattered to near-rest and in the appropriate spin state are trapped until they decay. Upon decay, the electron recoils in the helium, producing scintillation light which is transported out of the trapping region using acrylic lightguides to detectors at room temperature. (From P. R. Huffman et al., Nature, 403:62, 2000; reprinted by permission from Nature, http://www.nature.com, copyright 2000, Macmillan Magazines Ltd.)
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