A method for measurement of spin-spin couplings with sub-mHz precision using zero- to ultralow-field nuclear magnetic resonance

A Wilzewski; S Afach; J W Blanchard; D Budker

doi:10.1016/j.jmr.2017.08.016

A method for measurement of spin-spin couplings with sub-mHz precision using zero- to ultralow-field nuclear magnetic resonance

J Magn Reson. 2017 Nov:284:66-72. doi: 10.1016/j.jmr.2017.08.016. Epub 2017 Sep 1.

Authors

A Wilzewski¹, S Afach¹, J W Blanchard², D Budker³

Affiliations

¹ Johannes Gutenberg-Universität, 55099 Mainz, Germany.
² Helmholtz-Institut Mainz, 55099 Mainz, Germany. Electronic address: blanchard@uni-mainz.de.
³ Johannes Gutenberg-Universität, 55099 Mainz, Germany; Helmholtz-Institut Mainz, 55099 Mainz, Germany; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Department of Physics, University of California at Berkeley, CA 94720-7300, United States.

PMID: 28961479
DOI: 10.1016/j.jmr.2017.08.016

Abstract

We present a method which allows for the extraction of physical quantities directly from zero- to ultralow-field nuclear magnetic resonance (ZULF NMR) data. A numerical density matrix evolution is used to simulate ZULF NMR spectra of several molecules in order to fit experimental data. The method is utilized to determine the indirect spin-spin couplings (J-couplings) in these systems, which is achieved with precision of 10^-2-10^-4Hz. The simulated and measured spectra are compared to earlier research. Agreement and improved precision are achieved for most of the J-coupling estimates. The availability of fast, flexible fitting method for ZULF NMR enables a new generation of precision-measurement experiments for spin-dependent interactions and physics beyond the Standard Model.

Keywords: Spin-spin couplings; ZULF NMR; Zero-field NMR.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.