%0 Journal Article %J Physical Review Letters %D 2011 %T Near-Zero-Field Nuclear Magnetic Resonance %A Ledbetter, M. P. %A Theis, T. %A Blanchard, J. W. %A Ring, H. %A Ganssle, P. %A Appelt, S. %A Blumich, B. %A Pines, A. %A Budker, D. %K mri %X

We investigate nuclear magnetic resonance (NMR) in near zero field, where the Zeeman interaction can be treated as a perturbation to the electron mediated scalar interaction (J coupling). This is in stark contrast to the high-field case, where heteronuclear J couplings are normally treated as a small perturbation. We show that the presence of very small magnetic fields results in splitting of the zero-field NMR lines, imparting considerable additional information to the pure zero-field spectra. Experimental results are in good agreement with first-order perturbation theory and with full numerical simulation when perturbation theory breaks down. We present simple rules for understanding the splitting patterns in near-zero-field NMR, which can be applied to molecules with nontrivial spectra.

%B Physical Review Letters %V 107 %8 Sep 1 %@ 0031-9007 %G English %U ://WOS:000294406600017 %N 10 %M WOS:000294406600017 %! Near-Zero-Field Nuclear Magnetic Resonance %R Doi 10.1103/Physrevlett.107.107601