Hyperfine Anomaly in Eu Isotopes and the Universiability of the Moskowitz–Lombardi Formula

A method for determining the hyperfine anomaly, without using the nuclear magnetic moments, is used on a series of unstable isotopes of Eu. The large number of experimental data in Eu makes it possible to extract the hyperfine anomaly for a number of unstable isotopes. Calculations of the Bohr–Weisskopf effect and hence the hyperfine anomaly are performed using the particle-rotor formalism. The result from the calculations and experiments is compared with other theoretical calculations and the empirical Moskowitz–Lombardi formula. The results show that the Moskowitz–Lombardi formula is not universal.

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Multinuclear Magnetic Resonance Study of Sodium Salts in Water Solutions

Magnetochemistry ◽

10.3390/magnetochemistry5040068 ◽

2019 ◽

Vol 5 (4) ◽

pp. 68 ◽

Cited By ~ 1

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.

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Explorations of Magnetic Properties of Noble Gases: The Past, Present, and Future

Magnetochemistry ◽

10.3390/magnetochemistry6040065 ◽

2020 ◽

Vol 6 (4) ◽

pp. 65

Author(s):

Włodzimierz Makulski

Keyword(s):

Magnetic Properties ◽

Magnetic Resonance ◽

Noble Gases ◽

Theoretical Calculations ◽

Noble Gas ◽

Magnetic Moments ◽

Nuclear Magnetic Moments ◽

Muons And Neutrinos ◽

History Of ◽

Nuclear Magnetic

In recent years, we have seen spectacular growth in the experimental and theoretical investigations of magnetic properties of small subatomic particles: electrons, positrons, muons, and neutrinos. However, conventional methods for establishing these properties for atomic nuclei are also in progress, due to new, more sophisticated theoretical achievements and experimental results performed using modern spectroscopic devices. In this review, a brief outline of the history of experiments with nuclear magnetic moments in magnetic fields of noble gases is provided. In particular, nuclear magnetic resonance (NMR) and atomic beam magnetic resonance (ABMR) measurements are included in this text. Various aspects of NMR methodology performed in the gas phase are discussed in detail. The basic achievements of this research are reviewed, and the main features of the methods for the noble gas isotopes: 3He, 21Ne, 83Kr, 129Xe, and 131Xe are clarified. A comprehensive description of short lived isotopes of argon (Ar) and radon (Rn) measurements is included. Remarks on the theoretical calculations and future experimental intentions of nuclear magnetic moments of noble gases are also provided.

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