ISO_NWIPs-for-Ballot

ISO/NP

160

3.22 NMR spectrometer 161 spectroscopic apparatus that utilizes the nuclear resonance phenomenon of radio frequency absorption 162 in a magnetic field 163 3.23 164 superconducting magnet 165 electromagnet made from coils of superconducting material, capable of maintaining a permanent flow 166 of electric current and operating at cryogenic temperatures to produce a high magnetic field 167 3.24 168 NMR probe 169 apparatus for transmitting RF pulses to and receiving RF signals from a specimen 170 3.25 171 high-frequency pulse generator 172 apparatus consisting of an oscillator and a pulse generator to produce high-frequency pulses 173 3.26 174 Fourier transform NMR 175 FT-NMR 176 NMR apparatus that uses broadband radio frequency pulses to induce the NMR phenomenon, acquires 177 the radio frequency signal emitted during the relaxation process in the time domain, performs Fourier 178 transformation on the signal to convert it to a frequency-domain spectrum 179 3.27 180 Larmor frequency 181 angular frequency of the Larmor precession, which arises when a nucleus is placed in a magnetic field 182 3.28 183 shim 184 shim coils 185 group of electromagnetic coils used to correct the magnetic field inhomogeneity of a magnet system. 186 187 3.29 188 shimming 189 process of adjusting the current flow in each of the shim coils of an NMR magnet, which are designed to 190 generate a homogeneous static magnetic field in the sample region 191 3.30 192 digital resolution 193 frequency domain digital resolution is defined as spectral width in Hz over number of data points of the 194 real spectrum. 195 196 3.31 197 spectral width 198 width of the spectrum after Fourier transformation, in Hz or ppm 199 3.32 200 decoupling 201 means of eliminating spin coupling 202

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