Journal ArticleDOI
Interpretation of the Hyperfine Structures in the Low Even Configurations of Lanthanum II
J. Bauche,Jean-François Wyart,Z. Ben Ahmed,K. Guidara +3 more
- Vol. 304, Iss: 4, pp 285-292
TLDR
In this article, the hyperfine structures (hfs) of the levels of the 5d2 and 5d6s configurations of La II, recently measured very accurately by Hohle, Huhnermann and Wagner, are interpreted in the classical parametric scheme.Abstract:
The hyperfine structures (hfs) of the levels of the 5d
2 and 5d6s configurations of La II, recently measured very accurately by Hohle, Huhnermann and Wagner, are interpreted in the classical parametric scheme. For the magnetic part, the contribution of the two-body far-configuration-mixing effects is determined accurately from the hfs of four levels, and compared with an ab-initio evaluation. For the electric part, all three 5d parameters are determined. The Sternheimer corrections to the radialr
−3 integral are computed by the Multiconfigurational-Hartree-Fock method, and a corrected value of the electric-quadrupole nuclear moment is deduced:Q(139La)=0.20(1) 10−24 cm2.read more
Citations
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Journal ArticleDOI
Year-2008 nuclear quadrupole moments
TL;DR: In this paper, a set of nuclear quadrupole moments, Q, is presented, and a major revision of the value or an improvement of the accuracy is reported for 38Sr, 49In, 50Sn (Mossbauer state), 51Sb, 57La, 80Hg and 88Ra.
Journal ArticleDOI
Experimental Radiative Lifetimes, Branching Fractions, and Oscillator Strengths for La II and a New Determination of the Solar Lanthanum Abundance
TL;DR: In this article, the radiative lifetimes of a slow beam of lanthanum ions were measured using the US National Solar Observatory 1.0 m Fourier transform spectrometer.
Journal ArticleDOI
Effective operators in the atomic hyperfine interaction
TL;DR: In this article, the many-body perturbation theory (MBPT) is applied to the atomic hyperfine interaction and the results are interpreted in terms of effective operators for systems with a single valence electron such as the alkali atoms.
Journal ArticleDOI
Systematic calculations of low-lying states of even-even nuclei within the nucleon pair approximation
L. Y. Jia,H. Zhang,Y. M. Zhao +2 more
TL;DR: In this paper, a collective S and D nucleon pair approximation of the shell model is applied to even-even Sn, Te, Xe, Ba, and Ce isotopes with mass number A ∼120-150 and neutron number ranging from 74 to 90.
Journal ArticleDOI
Measurements of the hyperfine structure constants of all the 5d2 and 5d6s levels in139La II using the high-resolution spectroscopy on collinear laser-ion-beams
C. Höhle,H. Hühnermann,H. Wagner +2 more
TL;DR: In this article, the hyperfine structure constants A and B of all139La II even levels with 5d2 and 5d6s configurations have been measured, mainly by high-resolution spectroscopy on collinear laser-ion-beams.
References
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Book
Operator Techniques in Atomic Spectroscopy
TL;DR: In this paper, a comprehensive introduction to continuous groups for physicists and chemists is given. But it is not a complete overview of all the applications of group theory to the analysis of spectra.
Journal ArticleDOI
On Nuclear Quadrupole Moments
R. Sternheimer,R. Sternheimer +1 more
TL;DR: In this paper, the Schroedinger equation for the perturbed core wave functions for Li, Al, and Cl was used to calculate the correction to nuclear quadrupole moments on account of the quadrupoles induced in the electron shells.
Journal ArticleDOI
A general multi-configuration Hartree-Fock program
TL;DR: In this paper, a general multi-configuration Hartree-Fock program is described, which includes a rotation analysis to determine whether the energy is invariant with respect to a rotation of an orbital basis and off-diagonal Langrange multipliers may be set to zero.
Journal ArticleDOI
Quadrupole Antishielding Factors of Ions
TL;DR: In this article, the quadrupole antishielding factor for simple cubic lattice, NaCl structure, body-centered cubic, and facecentered cubic was derived for the nuclear hexadecapole interaction.
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Measurements of the hyperfine structure constants of all the 5d2 and 5d6s levels in139La II using the high-resolution spectroscopy on collinear laser-ion-beams
C. Höhle,H. Hühnermann,H. Wagner +2 more