Gas‐phase 21Ne NMR studies and the nuclear magnetic dipole moment of neon‐21

• Published in: Magnetic resonance in chemistry 2020-07, Vol.58 (7), p.648-652
• Main Authors: Makulski, Włodzimierz, Garbacz, Piotr
• Format: Article
• Language: English
• Subjects: 21Ne; 21Ne magnetic moment; and 2H NMR spectra; Density; Dipole moments; Magnetic dipoles; Magnetic moments; Magnetic permeability; Magnetism; Neon; NMR; NMR gas‐phase measurements; Nuclear magnetic resonance; Room temperature
• ISSN: 0749-1581; 1097-458X
• DOI: 10.1002/mrc.5006

Gas‐phase 21Ne nuclear magnetic resonance spectra were measured at the natural abundance of 21Ne isotope for samples consisting of pressurized neon up to 60 bar at room temperature and applying the magnetic field of the strength B0 = 11.7574 T. It showed that the nuclear magnetic resonance frequency is linearly dependent on the density of gaseous neon. The resonance frequency was extrapolated to the zero‐density point, and it permitted the determination of the 21Ne nuclear magnetic moment, μ(21Ne) = 0.6617774(10) μN. The present value of μ(21Ne) is not influenced by the bulk magnetic susceptibility of neon and interactions between neon atoms; therefore, it is more precise and reliable than the previous result obtained for μ(21Ne). On the basis of the measured 21Ne and 1H resonance frequencies and recent literature values of the proton magnetic moment and nuclear magnetic shielding of a neon atom, we determined the nuclear magnetic moment of neon‐21, µ(21Ne) = −0.6617774(10) µN. This value is in agreement with previous results obtained using the atomic beam magnetic resonance method.