…Instead of the previous sweep (continuously changing the frequency or magnetic field), this method irradiates a pulse containing all the electromagnetic waves corresponding to the width of the resonance frequency, and the resulting time domain spectrum is Fourier transformed to obtain a frequency domain spectrum. With the spread of NMR using pulsed Fourier transform, so-called FT NMR, it has become possible to measure NMR for C-13 and other nuclei such as N-15 and Si-29. The introduction of FT NMR has made it possible to obtain time-related parameters such as relaxation time. … *Some of the terminology that refers to "FT NMR" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…この方法は,それまでの掃引(周波数または磁場を連続的に変化させる)の代りに,共鳴周波数の幅に相当する電磁波をすべて含むパルスを照射し,得られる時間領域スペクトルをフーリエ変換して周波数領域スペクトルを得るものである。パルス・フーリエ変換によるNMRいわゆるFT NMRの普及によって,C‐13核やその他の核たとえばN‐15,Si‐29などのNMRの測定も可能となった。FT NMRの導入は,緩和時間など時間に関係するパラメーターの取得を可能にした。… ※「FT NMR」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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