Magnetic hyperfine structure and

This table contains the data obtained from the magnetic hyperfine structure and the Zeeman effect for molecules in a Z state or more generally in a state with Q = 0, i.e., the projection of the angular momentum onto the molecular axis is zero. For the magnetic hyperfine stracture one usually considers four terms the spin-rotation interaction for each nucleus and the scalar and tensorial spin-spin interaction of the two nuclear spins. For the Zeeman effect one takes into account the rotational Zeeman effect, the nuclear Zeeman effect with the scalar and tensorial shielding, and the scalar and tensorial magnetic susceptibility. The hamiltonian of these interactions can be written with the concept of spherical tensor operators [57Edm]... 

A detailed study of the magnetic hyperfine structure in Mossbauer spectra and the performance of DFT methods is available [25]. It is known that DFT typically... 

Magnetic Hyperfine Structure. The magnetic fields in most magnetic iodine and tellurium compounds are not sufficient to separate the 18 magnetic hyperfine lines of the two iodine isotopes. Several measurements (13, 21, 34, 36) have indicated that fields of only about 100 kilo-gauss can be expected from such compounds. Therefore, other methods must be utilized. 

BACK-GOUDSMIT EFFECT. An effect closely related to the Zeeman effect. It occurs in the spectrum of elements having a nuclear magnetic and mechanical moment. See also Hyperfine Structure and Paschen-Back Effect. 

The CPT theorem suffices to guarantee the equality of masses, lifetimes, spins, and exactly opposite charges and magnetic moments for particles and antiparticles. The following consequence is that the structure of bound species should be the same for both matter and antimatter in particular the fine, hyperfine structure, and Lamb shift of antiatoms should be the same as that of atoms. 

In our laboratory, we spend much of our time identifying contaminants. The studies described here are a case in point. Thus, the majority of the iron in the two samples described above belongs to a spectral component, NP (for nanoparticles), that exhibits magnetic hyperfine structure at 4.2 K. In whole cells, this component undoubtedly originates from ferric nanoparticles. What is the spectroscopic basis of this statement NP exhibits at 120 K a quadrupole doublet with AEQ = 0.65 mm/s and 5 = 0.45 mm/s. 

This value depends strongly on the correctness of the theory both for the muonium hyperfine structure and the electron magnetic anomaly. Alternatively, extracting a value for a from Avhfs instead represents a most valuable stringent consistency test for different branches of physics, which each allow to obtain a precise value of a (see Fig.3). 

At present the good agreement within two standard deviations between the fine structure constant determined from muonium hyperfine structure and the one from the electron magnetic anomaly is generally considered the best test of internal consistency of QED, as one case involves bound state QED and the other one QED of free particles. 

Abstract. CPT invariance is a fundamental property of quantum field theories in flat space-time. Principal consequences include the predictions that particles and their antiparticles have equal masses and lifetimes, and equal and opposite electric charges and magnetic moments. It also follows that the fine structure, hyperfine structure, and Lamb shifts of matter and antimatter bound systems should be identical. 

Ultrahigh Precision Measurements on Muonium Ground State Hyperfine Structure and Muon Magnetic Moment LAMPF Proposal, November 1986, V.W. Hughes, G zu Putlitz, P.A. Souder, Spokesmen. 

Miller and Townes [122] studied the magnetic hyperfine structure arising from the 170 nucleus in the 160170 isotopomer and were able to obtain information about the magnetic hyperfine parameters. We do not go into the details here, but will discuss... 

An alternative procedure for the Zeeman background corrector is to operate the hollow cathode continuously but to expose the sample to an alternating magnetic field. The sample atoms absorb at the resonance line when not exposed to the magnetic field, but develop hyperfine structure and do not absorb the resonance line when the magnet is turned on. With the magnetic field on, absorption of the resonance line is a measure of molecular background. From the combined data, the net atomic absorption can be measured. 

Influence of iron concentration. Spectra have also been recorded for a sample exchanged with Mohr s salt, neutralized to about 60 % and containing 17 % water. Hyperfine parameters are identical to those obtained for the less neutralized samples exchanged with ferrous chloride. There is no evidence in spectra at 4.2 K for magnetic hyperfine structure at this neutralization level and the lack of any significant magnetic interactions is also evident from the susceptibility which follows a simple Curie law down to 4.2 K. It follows that the ferrous ions are physically isolated from each other over a wide range of iron concentration. 

Finally, the K signal, constituting by a fine and a hyperfine structures and the presence of a weak signal intensity at half magnetic field, was attributed to ion pairs formed in ceria (10). 

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