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Updated: Jul 5, 2026

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Published on: October 9, 2020
NMR frequency and magnetic dipole moment of (3)He nucleus
Karol Jackowski1, Michał Jaszuński, Bohdan Kamieński
1Laboratory of NMR Spectroscopy, Faculty of Chemistry, Warsaw University, Pasteura 1, 02093 Warsaw, Poland. kjack@chem.uw.edu.pl
Abstract:
We present new gas-phase NMR spectra which relate the resonance frequency of (3)He nucleus to the resonance frequency of the proton in tetramethylsilane (TMS). We discuss the dependence of (3)He resonance frequency on the density of the solvent gas, and we consider in detail the absolute shielding scales of both nuclei. Finally, we analyse the accuracy of the results, using the relationship between the resonance frequencies, absolute shielding constants and magnetic dipole moments of (1)H and (3)He nuclei.
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