@article {2699, title = {Invited Review Article: Instrumentation for nuclear magnetic resonance in zero and ultralow magnetic field}, journal = {Review of Scientific Instruments}, volume = {88}, year = {2017}, month = {09/2017}, abstract = {

We review experimental techniques in our laboratory for nuclear magnetic resonance (NMR) in zero and ultralow magnetic field (below 0.1 μT) where detection is based on a low-cost, non-cryogenic, spin-exchange relaxation free 87Rb atomic magnetometer. The typical sensitivity is 20-30 fT/Hz1/2 for signal frequencies below 1 kHz and NMR linewidths range from Hz all the way down to tens of mHz. These features enable precision measurements of chemically informative nuclear spin-spin couplings as well as nuclear spin precession in ultralow magnetic fields.

}, doi = {https://doi.org/10.1063/1.5003347}, url = {http://aip.scitation.org/doi/abs/10.1063/1.5003347}, author = {Tayler, MCD and Theis, Thomas and Tobias F. Sjolander and John W. Blanchard and Kentner, A and Pustelny, S and Pines, Alexander and Budker, Dmitry} } @article {2698, title = {Measuring molecular parity nonconservation using nuclear-magnetic-resonance spectroscopy}, journal = {Physical Review A}, volume = {96}, year = {2017}, month = {10/2017}, abstract = {

The weak interaction does not conserve parity and therefore induces energy shifts in chiral enantiomers that should in principle be detectable in molecular spectra. Unfortunately, the magnitude of the expected shifts are small and in spectra of a mixture of enantiomers, the energy shifts are not resolvable. We propose a nuclear-magnetic-resonance (NMR) experiment in which we titrate the chirality (enantiomeric excess) of a solvent and measure the diasteriomeric splitting in the spectra of a chiral solute in order to search for an anomalous offset due to parity nonconservation (PNC). We present a proof-of-principle experiment in which we search for PNC in the 13C resonances of small molecules, and use the 1H resonances, which are insensitive to PNC, as an internal reference. We set a constraint on molecular PNC in 13C chemical shifts at a level of 10\−5 ppm, and provide a discussion of important considerations in the search for molecular PNC using NMR spectroscopy.

}, doi = {https://doi.org/10.1103/PhysRevA.96.042119}, url = {https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.042119}, author = {John W. Blanchard and J. Ellis and Bougas, L and M. G. Kozlov and Alexander Pines and Dmitri Budker} } @article {1924, title = {~Measurement of untruncated nuclear spin interactions via zero-to ultralow-field nuclear magnetic resonance}, journal = {Physical Review B}, year = {2015}, author = {John W. Blanchard and Tobias F. Sjolander and Jonathan P. King and Micah Ledbetter and Emma H. Levine and Vikram S. Bajaj and Dmitri Budker and Alexander Pines} }