Notizen: 27Al Nuclear Magnetic Resonance Studies in Solutions of Light and Heavy Water and the Ratio of the Larmor-Frequencies of 27Al and 2H

Epperlein, B. W.; Lutz, O.

doi:10.1515/zna-1968-0933

Cited by 17 publications

(2 citation statements)

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“…Aluminium has only one stable isotope with a nuclear spin of I = 5/2 and a strong nuclear magnetic dipole moment, μ I = 3.641 5069 (7) nuclear magnetons [13], leading to a potentially strong hyperfine interaction, as well as a small electric quadrupole moment, Q = 0.1402 (10) barns [14]. For the hyperfine interaction to be strong, the electrons have to have a large probability to be close to the nucleus, i.e.…”

Section: Hyperfine Interactionmentioning

confidence: 99%

“…A good assumption is therefore to treat the hyperfine level of 3 P 0 as only a linear combination of the F-state functions |3s5p 3 P 0 F = 5/2 and |3s5p 3 P 1 F = 5/2 . Using equation (10), the gf-value is then given by In an LS-coupled system, we also know that the two transition matrix elements are related as 3 S 1 D (1) 3 P 1 = √ 3 3 S 1 D (1) 3 P 0 , (13) which we use to rewrite the gf-value as…”

Section: The 3s5s 3 S-3s5p 3 P Spectrummentioning

confidence: 99%

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The anomalous hyperfine structure of Al II

Andersson

Lennartsson

Nilsson

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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The hyperfine structure of a large number of transitions in Al II cannot be described using A and B hyperfine constants and the hyperfine structure is therefore said to be anomalous. In this paper, we have studied the hyperfine structure of a few transitions in Al II, 3s5s 3 S-3s5p 3 P, 3s4d 3 D-3s5p 3 P and 3s5p 3 P-3s5d 3 D, by combining theory and experiment. It is shown that the anomalous hyperfine structure is due to strong off-diagonal hyperfine interaction resulting not only in a deplacement of the energies of the hyperfine levels, but also resulting in large intensity redistribution among the individual hyperfine lines. It is shown that the hyperfine mixing in 3s4d 3 D and 3s5d 3 D is very large, whereas small but not negligible in 3s5p 3 P. By combining experimental spectra and theory we could obtain accurate wavefunctions for the 3s4d 3 D and 3s5d 3 D hyperfine levels which were used to calculate the gf-values of all individual hyperfine transitions not only for 3s5p 3 P, but also for 3s3p 3 P and 3s4p 3 P, where the off-diagonal hyperfine interaction leads to negligible intensity redistribution.

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Section: Hyperfine Interactionmentioning

confidence: 99%

Section: The 3s5s 3 S-3s5p 3 P Spectrummentioning

confidence: 99%

The anomalous hyperfine structure of Al II

Andersson

Lennartsson

Nilsson

et al. 2012

J. Phys. B: At. Mol. Opt. Phys.

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The Development of NMR

Becker

Fisk

Khetrapal

2007

Encyclopedia of Magnetic Resonance

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Die Struktur der Solvathülle gelöster Teilchen

Hertz¹

1970

Angewandte Chemie

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Im ersten Teil des Aufsatzes wird iiber die Struktur der Solvathiille einfacher Ionen, und zwar iiberwiegend solcher rnit Edelgasstruktur, in waJriger und nichtwaJriger Losung berichtet. Die Solvatationszahl oder Koordinationszahl in ersfer Sphare kann heute in giinstigen Fallen bestimmt werden. Die Solvathiillen scheinen ,,fliissiger" zu sein als friiher angenommen wurde. Im zweiten Teil wird die Hydratation neutraler inerter Teil-Die Problematik sei an einigen Modellbeispielen verdeutlicht. Die Abbildungen 2,3 und 4 zeigen mogliche Effekte der gelosten Teilchen auf die Losungsmittelstruktur. Die klassische, positive Solvatation oder Abb. 2. Zweidimensionales molekulares Modell fur starke Solvatation geloster Teilchen in einer Fliissigkeit. -In waDriger Losung bedeuten die Striche an den Kreisen bei gelosten Anionen OH-Bindungen, bei gelosten Kationen einsame Elektronenpaare. Abb. 3. Zweidimensionales molekulares Modell fur schwache Solvatation geloster Teilchen in einer Fliissigkeit. Abb. 4. Zweidimensionales molekulares Modell fur Solvatation ,,inerter" geloster Teilchen ohne feste Orientierung zwischen Fliissigkeitsmolekiilen und gelosten Teilchen.

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Notizen: ²⁷Al Nuclear Magnetic Resonance Studies in Solutions of Light and Heavy Water and the Ratio of the Larmor-Frequencies of ²⁷Al and ²H

Cited by 17 publications

References 0 publications

The anomalous hyperfine structure of Al II

The anomalous hyperfine structure of Al II

The Development of NMR

Die Struktur der Solvathülle gelöster Teilchen

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