Word: nucleus
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Ramsey's procedure is so precise that the number of times the nucleus of a cesium atom rotates now can be measured with an accuracy of one part in a trillion...
...Ramsey's increased precision that enabled scientists to use the atomic clock for the official measurement of world time. In 1967, his method was used to redefine the second as the length of time it takes a cesium nucleus to rotate 9,192,631,770 times...
...nation. Take Iowa: six years ago, even church bingo games were illegal there. Now Iowa residents have some of the widest choices available in legal gambling. They can buy tickets in either the state lottery or Lotto America, an organization that some experts think may be the nucleus of a national lottery; it currently operates in eight states and the District of Columbia and expects to sign up two more states this summer. Iowans can also bet at one horse track and three dog tracks, and in two years they will be able to become riverboat gamblers. This spring...
Under certain conditions, deuterium nuclei combine and form a helium nucleus and release a tremendous amount of energy as heat...
Scientists theorize that conventional fusion yields one of two products: a helium nucleus consisting of two protons and one neutron and a high-energy neutron; or a radioactive form of hydrogen made up of two neutrons and a proton and a hydrogen...