dorsal/arxiv
View SchemaThe $\alpha$-dependence of transition frequencies for ions Si II, Cr II, Fe II, Ni II, and Zn II
| Authors | V. A. Dzuba, V. V. Flambaum, M. G. Kozlov, M. Marchenko |
|---|---|
| Categories | |
| ArXiv ID | physics/0112093 |
| URL | https://arxiv.org/abs/physics/0112093 |
| DOI | 10.1103/PhysRevA.66.022501 |
| Journal | Phys.Rev.A66:022501,2002 |
Abstract
We performed accurate calculation of $\alpha$-dependence ($\alpha=e^2/hc$) of the transition frequencies for ions, which are used in a search for the variation of the fine structure constant $\alpha$ in space-time. We use Dirac-Hartree-Fock method as a zero approximation and then the many-body perturbation theory and configuration interaction methods to improve the results. An important problem of level pseudocrossing (as functions of $\alpha$) is considered. Near the crossing point the derivative of frequencies over $\alpha$ varies strongly (including change of the sign). This makes it very sensitive to the position of the crossing point. We proposed a semiempirical solution of the problem which allows to obtain accurate results.
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"abstract": "We performed accurate calculation of $\\alpha$-dependence ($\\alpha=e^2/hc$) of\nthe transition frequencies for ions, which are used in a search for the\nvariation of the fine structure constant $\\alpha$ in space-time. We use\nDirac-Hartree-Fock method as a zero approximation and then the many-body\nperturbation theory and configuration interaction methods to improve the\nresults. An important problem of level pseudocrossing (as functions of\n$\\alpha$) is considered. Near the crossing point the derivative of frequencies\nover $\\alpha$ varies strongly (including change of the sign). This makes it\nvery sensitive to the position of the crossing point. We proposed a\nsemiempirical solution of the problem which allows to obtain accurate results.",
"arxiv_id": "physics/0112093",
"authors": [
"V. A. Dzuba",
"V. V. Flambaum",
"M. G. Kozlov",
"M. Marchenko"
],
"categories": [
"physics.atom-ph",
"astro-ph"
],
"doi": "10.1103/PhysRevA.66.022501",
"journal_ref": "Phys.Rev.A66:022501,2002",
"title": "The $\\alpha$-dependence of transition frequencies for ions Si II, Cr II, Fe II, Ni II, and Zn II",
"url": "https://arxiv.org/abs/physics/0112093"
},
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