英和和英

出典:『Wikipedia』 (2011/05/31 20:29 UTC 版)

英語による解説

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The Nuclear Overhauser Effect (NOE) is the transfer of nuclear spin polarization from one nuclear spin population to another via cross-relaxation. It is a common phenomenon observed by nuclear magnetic resonance (NMR) spectroscopy. The theoretical basis for the NOE was described and experimentally verified by Anderson and Freeman in 1962. The NOE is an extension of the seminal work of American physicist Albert Overhauser who first proposed that nuclear spin polarization could be enhanced by the microwave irradiation of the conduction electrons in certain metals in 1953. The general Overhauser effect was first demonstrated experimentally by T. R. Carver and C. P. Slichter also in 1953. Another early explication and experimental observation of the NOE was by Kaiser in 1963 in an NMR experiment where the spin polarization was transferred from one population of nuclear spins to another, rather than from electrons spins to nuclear spins. However, the theoretical basis and the applicable Solomon equations had already been published by Ionel Solomon in 1955.