Neddermeyer, Seth

Nakashima Hiroyuki, 659 Nalewajski Roman R, 714 Neddermeyer Seth H., 327 Nemethy George, 796 Neustadter S.P., elOl Newlands John, 446... 

Nagy Agnes 613 Nairz Olaf 43 Nakatsuji Hiroshi 561 Nalewajski Roman E 611, 613 Napoleon Bonaparte 177 Neddermeyer Seth H. 268 Nelson David R. 865 Nemethy George 684 von Neumann John 8, 219, 220, 317, 446, 764, 845, 898... 

Mesons were discovered in 1936, by the American physicists Carl Anderson and Seth Neddermeyer at the California Institute of Technology. They are produced by interaction of cosmic ra s with matter. They are either positive or negative in charge neutral mesons may also exist. Mesons are known with masses about 216 and 285 times that of the electron (called fi mesons and tt mesons, respectively), and there is evidence also for the existence of still heavier mesons (with mass about 900 times that of the electron). Mesons have very short lives they probably undergo decomposition into a positron or electron and two neutrinos. 

In the meantime Seth Neddermeyer, whose implosion experimentation group Parsons inherited, had visited a U.S. Bureau of Mines laboratory at Bruceton, Pennsylvania, to experiment with high explosives. Edwin McMillan, who was interested in implosion, went with the Caltech physicist ... 

After a few weeks. .. I found that my position was untenable because I was essentially in the middle trying to make sense of the efforts of two men who were at each other s throats. One was Captain [Deke] Parsons who tried to run his division the way it is done in military establishments—very conservative. The other was, of course, Seth Neddermeyer, who was the exact opposite of... 

George Kistiakowsky adjusted himself to Seth Neddermeyer until he felt that not only he but also the project was suffering then he reviewed his alternatives and, on June 3, wrote Oppenheimer a memorandum. He and Neddermeyer had established a certain modus vivendi, he wrote, but it was not what he had been asked to do, which was to administer implosion work while Neddermeyer did the science, and it was not based on mutual confidence and a friendly give-and-take. ... 

Seth Neddermeyer. His idea of using explosives to squeeze a nuclear core to criticality saved the plutonium bomb when impurities threatened its design. 73. Kitty Oppenheimer at Los Alamos with Peter,... 

Muon discovered (Seth Neddermeyer) Neddermeyer, working with Carl Anderson, J. C. Street, and E. C. Stevenson discover the muon (a particle similar to a heavy electron) while examining cosmic-ray tracks in a cloud chamber. 

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