On the Precision Measurement of Nuclear Magnetic Moments by the Molecular Beam Magnetic Resonance Method. The Moments ofH1,Li7,F19, andNa23

1941 ◽  
Vol 60 (2) ◽  
pp. 91-100 ◽  
Author(s):  
S. Millman ◽  
P. Kusch
Keyword(s):  
Magnetic Resonance ◽  
Precision Measurement ◽  
Molecular Beam ◽  
Magnetic Moments ◽  
Resonance Method ◽  
Nuclear Magnetic Moments ◽  
Magnetic Resonance Method ◽  
Nuclear Magnetic

scholarly journals Multinuclear Magnetic Resonance Study of Sodium Salts in Water Solutions

2019 ◽  
Vol 5 (4) ◽  
pp. 68 ◽  
Author(s):  
Włodzimierz Makulski
Keyword(s):  
Experimental Data ◽  
Magnetic Resonance ◽  
Magnetic Moments ◽  
Resonance Method ◽  
15N Nmr ◽  
Water Solutions ◽  
Nuclear Magnetic Moments ◽  
Shielding Constants ◽  
15N Nmr Spectroscopy ◽  
Nuclear Magnetic

The small amounts of gaseous 3He dissolved in low concentrated water solutions of NaCl, NaNO3 and NaClO4 were prepared and examined by 3He-, 23Na-, 35Cl- and 15N-NMR spectroscopy. This experimental data, along with new theoretical shielding factors, was used to measure the 23Na nuclear magnetic moment against that of helium-3 μ(23Na) = +2.2174997(111) in nuclear magnetons. The standard relationship between NMR frequencies and nuclear magnetic moments of observed nuclei was used. The nuclear magnetic shielding factors of 23Na cation were verified against that of counter ions present in water solutions. Very good agreement between shielding constants σ(3He), σ(23Na+), σ(35Cl‒), σ(35ClO4‒), σ(15NO3‒) in water at infinite dilution and nuclear magnetic moments was observed for all magnetic nuclei. It can be used as a reference nucleus for calculating a few other magnetic moments of different nuclei by the NMR method. An analysis of new and former μ(23Na) experimental data obtained by the atomic beam magnetic resonance method (ABMR) and other NMR measurements shows good replicability of all specified results. The composition of sodium water complexes was discussed in terms of chemical equilibria and NMR shielding scale.

scholarly journals The Radiofrequency NMR Spectra of Lithium Salts in Water; Reevaluation of Nuclear Magnetic Moments for 6Li and 7Li Nuclei

2017 ◽  
Author(s):  
Włodzimierz Makulski
Keyword(s):  
Dipole Moments ◽  
Magnetic Moments ◽  
Resonance Method ◽  
Resonance Spectroscopy ◽  
Water Solutions ◽  
Nuclear Magnetic Moments ◽  
Magnetic Resonance Method ◽  
Concentration Dependences ◽  
Shielding Constants ◽  
Nuclear Magnetic

The LiCl and LiNO3 water solutions in the presence of small amounts of 3-helium have been investigated by means of multinuclear resonance spectroscopy. The resulting concentration dependences of the 3He, 6,7Li+, 14NO3¯ and 35Cl¯ resonance radiofrequencies are reported in the infinite limit. This data along with new theoretical corrections of shielding lithium ions was analyzed by a known NMR relationship method. Consequently, the nuclear magnetic moments of 6Li and 7Li were established against that of the helium-3 dipole moment: μ(6Li)=+0.822046(5)μN and μ(7Li)=+3.256418(20)μN. The new results were shown to be very close to the previously obtained values of the (ABMR) atomic beam magnetic resonance method. This experiment proves that our helium method is well suited for establishing dipole moments from NMR measurements performed in water solutions. This technique is especially valuable when gaseous substances of the needed element are not available. All shielding constants of species present in water solutions are consistent with new nuclear magnetic moments and these taken as a reference. Both techniques – NMR and ABMR – give practically the same results providing that all shielding corrections are properly made.

Sign in / Sign up

Export Citation Format

Share Document