In earlier studies, Fermi had found that uranium nuclei would absorb neutrons more easily if the neutrons were moving relatively slowly. (scientificamerican.com)
The Langevin 4D model improves how we can predict low - energy fission and can be used for various nuclei such as poisonous nuclear wastes populated by successively absorbed neutrons starting from uranium. (sciencedaily.com)
TEPCO is currently injecting seawater and boric acid — boron absorbs the neutrons that radioactive materials give off to prevent any self - sustaining fission — into two of the three reactors, according to the company's statements. (scientificamerican.com)