Isotope Shifts in Atomic Spectra

King, W. H.

doi:10.1007/978-1-4899-1786-7

Cited by 400 publications

(408 citation statements)

References 227 publications

(449 reference statements)

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“…where the first term alone corresponds to the prescription of King [7] ‡. The expectation value (10) is dominated by its Hartree-Fock value i.e., in Cl, by the (s, p) Vinti integrals [33] which contribute negatively.…”

Section: Isotope Mass Shiftmentioning

confidence: 99%

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Carette

Godefroid

2013

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

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Abstract. Today, the electron affinity is experimentally well known for most of the elements and is a useful guideline for developing ab initio computational methods. However, the measurements of isotope shifts on the electron affinity are limited by both resolution and sensitivity. In this context, theory eventually contributes to the knowledge and understanding of atomic structures, even though correlation plays a dominant role in negative ions properties and, particularly, in the calculation of the specific mass shift contribution. The present study solves the longstanding discrepancy between calculated and measured specific mass shifts on the electron affinity of chlorine [Phys. Rev. A 51, 231 (1995)].

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Section: Isotope Mass Shiftmentioning

confidence: 99%

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Carette

Godefroid

2013

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

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“…(3) depend on the details of the atomic structure (see [10,11] for details). Note that in this paper we use the common sign convention with k NMS Ͼ 0 [13,14], which differs from the convention used in [10,11] and some other publications. The present accuracy of the theory for k SMS for atoms with more than one valence electron is not always sufficient for our purpose.…”

Section: ͓6͔ · ͑2͒mentioning

confidence: 99%

Space-time variation of the fine-structure constant and evolution of isotope abundances

et al. 2004

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At present several groups are analyzing astrophysical data in a search for the time variation of the finestructure constant ␣. Here we discuss how to exclude systematic effects caused by changes in the isotope abundances during the evolution of the universe. We suggest using particular combinations of the transition frequencies of O II, Al II, Al III, Si II, and Mn II as anchors, which are insensitive to ␣ variation and to changes in isotope abundances. These anchors can be used to determine the cosmological redshift. Then, one can use other combinations of frequencies as probes for the time variation of ␣ and another set as probes for the isotopic abundances. In this way it is possible to eliminate one source of systematic errors in the search for ␣ variation and get more information about evolution of the isotopes. On the level of accuracy that has already been reached in the search for ␣ variation it is possible to see ϳ10% changes in isotope abundances of Si and Ni.

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“…Finally, the separation of the MS contribution proceeded through a King plot using the corrected F 307.6 value together with δ r 2 μ−e data from Ref. [56].…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The isotope shift (IS) of spectral lines, which consists of the mass shift (MS) and the field shift (FS), plays a key role in extracting the changes in mean-square charge radii of the atomic nuclei [2][3][4]. For a given atomic transition k with frequency ν k , it is assumed that the electronic response of the atom to variations of the nuclear mass and charge distribution can be described by only two factors: the mass-shift factor K k,MS and the field-shift factor F k .…”

Section: Introductionmentioning

confidence: 99%

“…The isomer shift between the nuclear ground state and the long-lived 1/2 + isomeric state was measured, and the change of the mean-square charge radii of 79,79m Zn has been extracted via the MS and FS electronic factors. The latter were obtained * Livio.Filippin@ulb.ac.be † jacek.bieron@uj.edu.pl ‡ Gediminas.Gaigalas@tfai.vu.lt § mrgodef@ulb.ac.be ¶ per.jonsson@mah.se from a King-plot process [2] using the root-mean-square charge radii of isotopes from Refs. [5] and [7].…”

Section: Introductionmentioning

confidence: 99%

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Multiconfiguration calculations of electronic isotope-shift factors in Zn i

et al. 2017

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The present work reports results from systematic multiconfiguration Dirac-Hartree-Fock calculations of electronic isotope-shift factors for a set of transitions between low-lying states in neutral zinc. These electronic quantities, together with observed isotope shifts between different pairs of isotopes, provide the changes in mean-square charge radii of the atomic nuclei. Within this computational approach, different models for electron correlation are explored in a systematic way to determine a reliable computational strategy and to estimate theoretical error bars of the isotope-shift factors.

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Isotope Shifts in Atomic Spectra

Cited by 400 publications

References 227 publications

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Isotope shift on the chlorine electron affinity revisited by an MCHF/CI approach

Space-time variation of the fine-structure constant and evolution of isotope abundances

Multiconfiguration calculations of electronic isotope-shift factors in Zn i

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