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Childs, W. J.; Poulsen, O.; Goodman, L. S.; Crosswhite, H. M.

doi:10.1103/physreva.19.168

Cited by 52 publications

(24 citation statements)

References 8 publications

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“…References. 16) Childs et al (1979); 17) Lefèbvre et al (2002); 18) Johann et al (1981); 19) Cochrane et al (1998); 20) Armstrong et al (2011); 21) estimated from solar profiles by trial and error with a single snapshot of an earlier version of the 3D model (Asplund et al 2000a); 22) Jarosz et al (2007); 23) Dembczyński et al (1979); 24) Blackwell-Whitehead et al (2005a); 25) Handrich et al (1969); 26) Luc & Gerstenkorn (1972); 27) Lefèbvre et al (2003); 28) Johann et al (1981); 29) Pickering (1996).…”

Section: Discussionunclassified

“…In this system, no tier contained more than one value for any given level. In the top tier were the ABMR and LFS data of Childs et al (1979), the ABMR results of El-Kashef & Ludwig (1992), Unkel et al (1989), Johann et al (1981) and Childs & Goodman (1967), and the FTS data of Palmeri et al (1997). The second tier consisted of an earlier FTS study by Palmeri et al (1995) and the crossedbeam results of Cochrane et al (1998).…”

Section: Hyperfine Structurementioning

confidence: 99%

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The elemental composition of the Sun

Scott

Asplund

Grevesse

et al. 2014

A&A

269

202

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We redetermine the abundances of all iron group nuclei in the Sun, based on neutral and singly-ionised lines of Sc, Ti, V, Mn, Fe, Co and Ni in the solar spectrum. We employ a realistic 3D hydrodynamic model solar atmosphere, corrections for departures from local thermodynamic equilibrium (NLTE), stringent line selection procedures and high quality observational data. We have scoured the literature for the best quality oscillator strengths, hyperfine constants and isotopic separations available for our chosen lines. We find log Sc = 3.16 ± 0.04, log Ti = 4.93 ± 0.04, log V = 3.89 ± 0.08, log Cr = 5.62 ± 0.04, log Mn = 5.42 ± 0.04, log Fe = 7.47 ± 0.04, log Co = 4.93 ± 0.05 and log Ni = 6.20 ± 0.04. Our uncertainties factor in both statistical and systematic errors (the latter estimated for possible errors in the model atmospheres and NLTE line formation). The new abundances are generally in good agreement with the CI meteoritic abundances but with some notable exceptions. This analysis constitutes both a full exposition and a slight update of the preliminary results we presented in Asplund et al. (2009, ARA&A, 47, 481), including full line lists and details of all input data we employed.

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Section: Discussionunclassified

Section: Hyperfine Structurementioning

confidence: 99%

The elemental composition of the Sun

Scott

Asplund

Grevesse

et al. 2014

A&A

269

202

View full text Add to dashboard Cite

show abstract

“…Historically, deflection MBER/ MBMR experiments were applied to virtually all stable molecules, and today, the study of state-selected molecules in field gradients is experiencing a surge of popularity in relation to molecular deceleration. 17 In order to enhance the sensitivity, the A field, B field, and beam detection steps have been replaced by laser beams in many modern experiments, [18][19][20][21][22][23] but the original nomenclature has remained. The so-called optically detected magnetic resonance (ODMR) method is based on the addressability of atom (or molecule) electronic states using single-frequency laser light, and spin-polarized atoms (or molecules) are produced by optical pumping.…”

Section: Introductionmentioning

confidence: 99%

Molecular Beam Magnetic Resonance in Doped Helium Nanodroplets. A Setup for Optically Detected ESR/NMR in the Presence of Unresolved Zeeman Splittings

et al. 2009

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An apparatus is presented to perform magnetic resonance measurements in a beam of doped helium nanodroplets. This type of experiment faces the same difficulties as traditional molecular beam electric/magnetic resonance experiments, namely, an optically thin sample. Like many of these traditional experiments, it uses lasers to prepare the states of interest and to detect them after manipulation with a microwave field. Unlike these traditional experiments, Zeeman substates cannot be resolved by the laser transition because of the droplet-induced line broadening. A magnetic dichroism scheme is used instead, exploiting the favorable selection rules for the absorption of circularly polarized light. ESR spectra are shown for K atoms captured on the surface of He nanodroplets. The extension of the method to other atoms and molecules, and to NMR spectroscopy, is discussed.

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“…(The factor (1/2S) arises because of differences in the microscopic vs. macroscopic form of the Hamiltonian for the Fermi contact interaction, namely AES jjs i jjS ae = (1/2S) AESjjSjjSae [26].) The atomic b F parameter for vanadium is 3105 MHz [27]. Hence, the 9r orbital is approximately 84.9% and 75.2% V(4s) in VN and VO, respectively, similar to the values derived by Balfour et al [4].…”

Section: Discussionmentioning

confidence: 99%