Constant-adiabaticity RF-pulses for generating long-lived singlet spin states in NMR
Abstract
A method is implemented to perform "fast" adiabatic variation of the spin Hamiltonian by imposing the constant adiabaticity condition. The method is applied to improve the performance of singlet-state Nuclear Magnetic Resonance (NMR) experiments, specifically, for efficient generation and readout of the singlet spin order in coupled spin pairs by applying adiabatically ramped RF-fields. Test experiments have been performed on a specially designed molecule having two strongly coupled C-13 spins and on selectively isotopically labelled glycerol having two pairs of coupled protons. Optimized RF-ramps show improved performance in comparison, for example, to linear ramps. We expect that the methods described here are useful, not only for singlet-state NMR experiments, but also for other experiments in magnetic resonance, which utilize adiabatic variation of the spin Hamiltonian.
Keywords
Cite
@article{arxiv.1810.12697,
title = {Constant-adiabaticity RF-pulses for generating long-lived singlet spin states in NMR},
author = {Bogdan A. Rodin and Kirill F. Sheberstov and Alexey S. Kiryutin and Joseph T. Hill-Cousins and Lynda J. Brown and Richard C. D. Brown and Baptiste Jamain and Herbert Zimmermann and Renad Z. Sagdeev and Alexandra V. Yurkovskaya and Konstantin L. Ivanov},
journal= {arXiv preprint arXiv:1810.12697},
year = {2019}
}
Comments
14 pages, 13 figures, 2 tables