Experimental Evidence for Dynamic Nuclear Polarization by Cooling of Electron Spin-Spin Interactions
- 31 May 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 26 (22) , 1362-1365
- https://doi.org/10.1103/physrevlett.26.1362
Abstract
Comparison of deuteron and proton dynamic polarizations measured simultaneously in butanol samples doped with porphyrexide, a free radical, shows that these polarizations correspond to equal spin temperatures for these different nuclei, in agreement with effects of dynamic orientation of nuclei by cooling of electron interactions, and in disagreement with the solid-state effect.Keywords
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