Word: nucleus
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Although graduation took much of the depth out of the halfback line, a good nucleus still remains. "Pants" Pantalconi, center halfback at the beginning of last year, will probably return to his old position, flanked by Latsi Berger on the right and either Larry Leonard or Getchell on the left...
Water, reasoned Vonnegut, forms hexagonal ice crystals with well-known characteristics. If another hexagonal crystal could be found with nearly the same characteristics, the water molecules in the air might be fooled into building up on it as if it were a genuine ice nucleus...
...hydrogen bomb's necessary ingredients (a principal one, Dr. Bacher implies) is tritium, the heavy form of hydrogen with one proton and two neutrons in its nucleus. Tritium must be made in a chain-reacting pile by a reaction that costs one free neutron for every atom of tritium produced. There are plenty of free neutrons in a pile, but they originate in fissioning atoms of uranium-235 and are normally used to form plutonium (for atom bombs) out of nonfissionable U-238. Each neutron that is used to form an atom of tritium means less plutonium...
Scientists, always striving with the rest of mankind to work toward greater & greater simplicity, often fare no better than politicians, industrialists, economists and plain citizens: the longer they work, the more complex things get. Delving into the secrets of the atomic nucleus, which once seemed fairly simple, the physicists are finding a new, mysterious and baffling world. Apparently the nucleus contains all sorts of sub-atomic particles...
...University of Manchester, found mysterious tracks on photographic plates that had been exposed to cosmic rays. The tracks were of two types, and neither could be explained by any known theory. Rochester and Butler suspected that they were made by two unknown particles knocked out of an atomic nucleus, but they could not prove it conclusively...