The Nuclear Moments of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ta</mml:mi></mml:mrow><mml:mrow><mml:mn>181</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>

Brown, B. M.; Tomboulian, D. H.

doi:10.1103/physrev.88.1158

Cited by 24 publications

(7 citation statements)

References 10 publications

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“…The orbital hyperfine field was calculated with the mean value of (r-3)~a=5.3 a.u. obtained from hyperfine coupling constants of Ta I [32] and also reduced by a factor of 0.7 [23] to the field in the metal. In Table 2 the conduction electron contribution to the susceptibility, the hyperfine fields, and with the aid of (4), the elements of the Knight shifts are summarized.…”

Section: Resultsmentioning

confidence: 99%

Observation of knight shifts in metallic tungsten and tantalum with the 6.2 keV181Ta M�ssbauer resonance

Salomon

West

1978

Z Physik A

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Completely resolved M6ssbauer spectra for the 6.2keV ~S~Ta transition were measured at R.T. in external magnetic field of 2.8 and 4.4kOe for ~8~Ta impurities in W-and Tametal respectively. A more precise mean value for the g-factor ratio gg/2/g7/2 of 1.797 (3) was obtained. The magnetic moment of the 6.2 keV-state was determined to be + 5.47 (2) n.m. From the hyperfine fields at the 181Ta-nuclei in W a Knight-shift of 2(1)% and in Ta of 1.7(8)% was deduced. For the spectrum of the magnetically splitted Ta-metal absorber a reduced dispersion parameter of 2 ~ = 20 (2) was measured, while the linewidth showed only a slight narrowing.

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Section: Resultsmentioning

confidence: 99%

Observation of knight shifts in metallic tungsten and tantalum with the 6.2 keV181Ta M�ssbauer resonance

Salomon

West

1978

Z Physik A

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“…Concerning the hf structure, a relatively low number of publications can be found. In 1952, Brown and Tamboulian [17] determined for the first time the nuclear moments of 181 Ta investigating the hf structure of 7 Ta II lines. In 1987, Engleman Jr. [18] determined the hf constants of several Ta II levels and improved the energy values, but the results were presented only at a symposium but never published.…”

Section: Ta IImentioning

confidence: 99%

The Role of the Hyperfine Structure for the Determination of Improved Level Energies of Ta II, Pr II and La II

Windholz

2017

Atoms

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For the determination of improved energy levels of ionic spectra of elements with large values of nuclear magnetic dipole moment (and eventually large values of nuclear quadrupole moments), it is necessary to determine the center of gravity of spectral lines from resolved hyperfine structure patterns appearing in highly resolved spectra. This is demonstrated on spectral lines of Ta II, Pr II and La II. Blend situations (different transitions with accidentally nearly the same wave number difference between the combining levels) must also be considered.

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“…This is to be compared with the value of 2.8 nm obtained by Huus and Bjerregaard using a somewhat less direct method and a spectroscopic value of 2.1 nm. 6 Further interest in the energy levels of tantalum arises from the agreement of the spacing of these levels with that predicted by the rotational model of the nucleus of Bohr and Mottelson. 7 For an even-odd nucleus with ground-state spin 7/2, (Ta 181 ) the model predicts excited states of spins 9/2 and 11/2 having energies above the ground state in the proportion of 9 to 20.…”

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confidence: 92%