Word: nuclei
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Dates: during 1950-1959
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...lunched with Robert V. Pound, then on leave from a Harvard Junior Fellowship, and H. C. Torrey, on leave from Rutgers. During the conversation, Purcell mentioned the idea he was mulling over. Briefly it involved measuring the forces at work inside atoms, taking advantage of the fact that most nuclei act as if they are extremely small, rapidly spinning bar magnets. "The only difficulty to be solved was that no one knew whether the extremely feeble effect of these magnets in ordinary substances could actually be detected...
Edward M. Purcell, professor of Physics, told Swedish scientists and newsmen yesterday that his newly developed methods for measuring the magnetic fields of atomic nuclei would contribute to the creation of a better atomic theory...
...structure of atomic nuclei is far more complicated than we imagined 15 years ago," he said. "The atomic theory we have today is not a very good one. But when we get a better atomic theory, which I believe we will one day, we will also have a method to check...
...prizes will be presented by Guatsav Adolph VI, king of Sweden, in ceremonies at Stockholm Wednesday. Purcell shares this year's prize in physics with Stanford's Felix Bloch. Both simultaneously developed methods for measuring magnetic forces in atomic nuclei...
Their technique consists, essentially, of placing a substance containing the atoms they wish to study inside the core of a high frequency coil, which in turn is placed in the field of a strong magnet. When oscillations corresponding to the resonance frequency of the nuclei are fed into the coil, the magnetic activities of the nuclei are amplified and can be easily recorded...