Word: proton
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Dates: during 1950-1959
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Chamberlain, by means of his work at California, proved the existence of the anti-proton, a sub-atomic particle with a charge opposite to a normal proton. Using California's huge particle accelerator, the 39-year-old scientist worked with Segre and developed new methods to prove the existence of the particle...
Water for Fuel. The first step toward creating a controlled fusion reaction is to heat up deuterium gas until the nucleus (one proton and one neutron) of each atom is separated from the electron that ordinarily orbits around it (deuterium is the hydrogen isotope in heavy water, D2O). If the particles are made hot enough, the deuterium nuclei will collide with ample force to "fuse" together, forming helium 3 and giving off a neutron. When that happens, part of their mass is converted into energy-the energy of the hydrogen bomb, the stars...
...bubble-chamber picture (see cut), an antiproton from the Bevatron enters at bottom and hits a proton (1): out of the collision come one lambda and one anti-lambda particle. Since both are neutral electrically, they leave no tracks in the liquid hydrogen, but after a short, invisible career, each decays into track-leaving particles by which it can be identified. The lambda ( 2) turns into a proton and a negative pi meson, both of which go off the picture leaving strong curved tracks. The anti-lambda (3) turns into an antiproton and a positive pi meson. The positive...
...Parts in 1 Billion Billion. Lyttleton and Bondi belong to the British school of cosmology, which holds that matter is being created continuously in the form of hydrogen atoms appearing in empty space. Each hydrogen atom consists of one electron and one proton, and physicists have generally assumed that the positive electrical charge of the proton is exactly equal to the negative charge of the electron. Lyttleton and Bondi point out that this is only an assumption...
...contains condensations: galaxies and clusters of galaxies, each made of billions of stars and surrounded by clouds of gas. Inside these units, say Lyttleton and Bondi, there is no electrostatic repulsion. Instead, some of the hydrogen atoms between the stars are ionized (i.e., separated into a proton and an electron) by light and other radiation. These ions form a kind of electrical conductor: free protons move to the outside of the unit until they have carried away enough positive electricity to make the interior electrically neutral...