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Magnetic Resonance - Proceedings of the International Symposium on Electron and Nuclear Magnetic Resonance, held in Melbourne, August 1969, sponsored by the Australian Academy of Science (Paperback, Softcover reprint of the original 1st ed. 1970)
Loot Price: R3,023
Discovery Miles 30 230
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Magnetic Resonance - Proceedings of the International Symposium on Electron and Nuclear Magnetic Resonance, held in Melbourne, August 1969, sponsored by the Australian Academy of Science (Paperback, Softcover reprint of the original 1st ed. 1970)
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TWENTY-FIVE years ago in Russia, Zavoisky made the first experimen
tal observation of electron spin resonances; and a year later
Purcell, Torrey and Pound at Harvard and Bloch, Hansen and Packard
at Stanford ('The Harvard of the West') observed nuclear magnetic
resonances for the first time. In both cases (ESR and NMR) the
phenomena had been previously predicted, and Gorter - surely one of
the most unlucky experimenters of our time - had made his noble
attempts to detect magnetic resonances. Purcell et aZ. , having
beaten their radar swords into scientific ploughshares, used a re 3
sonant coaxial cavity, filled the inductive part with 850 cm of
paraffin, and produced a resonance with a signal-to-noise ratio of
20. They predicted that the sensitivity could be increased several
hundred-fold and foresaw applications in determining magnetic mo
ments, investigating spin-lattice coupling and measuring magnetic
fields. Their letter reached the editor of Phys. Rev. on Christmas
Eve 1945, and the basis of NMR in the solid state was laid. Bloch
et aZ. , fortunately working independently, established the
entirely different, crossed-coil approach to the observation of NMR
in a water sample, which they doped with paramagnetic ions to
reduce the relaxation times. They had laid the foundation of
liquid-state NMR. Their letter to Phys. Rev. was received on 29
January 1946.
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