Fig.5.
Variation of Overhauser enhancement with change in NMR detection field. DNP spectra of 1mM TEMPOL at multiple NMR detection fields (A) B0NMR = 97 G, (B) B0NMR = 200 G, (C) B0NMR = 587 G and same EPR magnetic field corresponding to a frequency of 282.3 MHz, EPR pulse duration of 500 ms and EPR irradiation power of 5 W and TR=1300 ms. The resolution of the field sweep was 0.5 G.