Subatomic investigators find neutrons elusive little things to deal with. Unlike electrons, protons and positrons, they have no electric charge. Slippery as wrestlers covered with oil they slide through the electric fields of atoms, are not deflected until they collide squarely with a nucleus. Nevertheless their mass (about 1,800 times that of an electron) has been established within fairly precise limits. And last week three Columbia physicists announced the size of the neutron as slightly less than .0000000000001 (one ten-trillionth) of an inch.
Before they could reach that conclusion even with the powerful wave...
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