Publication
In most applications of dissolution-DNP, the polarization of nuclei with low gyromagnetic ratios such as C-13 is enhanced directly by irradiating the ESR transitions of radicals with narrow ESR lines such as Trityl at low temperatures T = 1.2 K in polarizing fields B-0 C-13) in excess of 70% within 20 min. After rapid dissolution to room temperature, this is 122000 times larger than the Boltzmann polarization at 300 K and 6.7 T. (c) 2012 Elsevier B.V. All rights reserved.
Giovanni Boero, Fabio Donati, Soyoung Oh