Search Details

Word: protons (lookup in dictionary) (lookup stats)
Dates: all
Sort By: most recent first (reverse)


Usage:

...Heavy shielding may also be unnecessary, suggested Physicist S. Fred Singer of the University of Maryland. He believes the belt starts at 250 miles beyond earth, stops at 40,000 miles, is most intense above the equator and weakest above the poles. He theorizes that it consists of protons, trapped by the earth's magnetic field, which spiral around lines of magnetic force at right angles. Thus a manned vehicle (launched near the poles) might carry a lightweight shielding ring to avoid proton concentrations, or use magnetic screening to repel them. Also possible: a satellite designed to "sweep...

Author: /time Magazine | Title: Science: Off into Space | 9/8/1958 | See Source »

...theorizes that they may all be multiples or combinations of only two: pairs of the negatively charged electron and the positively charged electron (positron). Reason is his discovery of two key particle ratios: that between the mass of mu and pi mesons, and that between the mass of the proton and sigma hyperon. Each proves to equal TT divided by four; this produces a new constant (1.12888), based on the inverse of the square root of TT divided by four, which Grebe calls "g." This tool "opens the door," produces a periodic table of particles similar to Mendeleev...

Author: /time Magazine | Title: Science: Assumptions of Symmetry | 5/5/1958 | See Source »

Star of Suicides. Dr. Segrè has no doubt about what happened. The antiproton, he says, hit an ordinary, positively charged proton and reacted with it in such a way that the collision produced one ordinary neutron and one antineutron. These two particles differ only in their magnetic properties. Neither has any electric charge, and therefore they left no bubble trails. The neutron shot out of the picture undetected, but the antineutron hit a carbon atom in the propane and committed double suicide with one of its protons or neutrons. The atom disintegrated, leaving a star of bubble trails made...

Author: /time Magazine | Title: Science: Anti-Physics | 4/21/1958 | See Source »

...same simple purpose: to heat gaseous deuterium (heavy hydrogen) as hot as possible and confine it in a small space as long as possible. When deuterium atoms get hot enough, they hit each other so hard that they "fuse," forming helium 3 (and a neutron) or tritium (and a proton), and give off energy. This process happens explosively in H-bombs, but to control the reaction, the deuterium must be confined. Since ordinary, solid walls cannot hold the gas at the necessary temperature of many million degrees, fusion reactors use walls of magnetic force. They are strong, do not cool...

Author: /time Magazine | Title: Science: Toward H-Power | 2/3/1958 | See Source »

...Russians now have the world's most powerful particle accelerator. Last week Soviet scientists announced that the great proton synchrotron in the village of Dubna near Moscow has gone into operation and is generating protons with 8.3 billion electron-volts of energy. This beats the 6 billion-volt Bevatron at Berkeley, Calif, by a comfortable margin, and the Russian scientists are confident that their machine will soon reach its designed power...

Author: /time Magazine | Title: Science: Soviet Champ | 4/22/1957 | See Source »

Previous | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | Next