| 单词 | magnetic resonance |
| 释义 | > as lemmasmagnetic resonance c. Physics and Chemistry. The transition of a particle possessing a magnetic moment between different quantum states when it is in the presence of a magnetic field and electromagnetic radiation of an appropriate frequency; a spectroscopic technique which makes use of this phenomenon. Also magnetic resonance.electron spin resonance, functional magnetic resonance imaging, magnetic resonance accelerator, magnetic resonance imaging, nuclear magnetic resonance: see the first element. ΘΚΠ the world > matter > physics > atomic nucleus > [noun] > field of energy > magnetic resonance resonance1938 nuclear magnetic resonance1942 1938 Physical Rev. 53 318/2 The experimental procedure is to vary the homogeneous field for some given value of the frequency of the oscillating field until the resonance is observed by a drop in intensity at the detector and a subsequent recovery when the resonance value is passed. 1950 Physical Rev. 79 698/1 A situation in which any quadrupolar splitting of the nuclear resonance in a magnetic field is small compared to the magnetic resonance frequency itself. 1995 J. Shreeve Neandertal Enigma (1996) vii. 183 When they flip, each electron absorbs a finite amount from a microwave field also applied to the sample. This energy loss, called resonance, can be measured with a detector. 2003 P. M. Lenahan in J. Greer Nano & Giga Challenges in Microelectronics vii. 244/1 No quantum calculations have yet been carried out in solid state resonance based systems. < as lemmas |
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