dorsal/arxiv
View SchemaAccurate relativistic many-body calculations of van der Waals coefficients C_8 and C_10 for alkali-metal dimers
| Authors | Sergey Porsev, Andrei Derevianko |
|---|---|
| Categories | |
| ArXiv ID | physics/0303048 |
| URL | https://arxiv.org/abs/physics/0303048 |
| DOI | 10.1063/1.1578052 |
Abstract
We consider long-range interactions between two alkali-metal atoms in their respective ground states. We extend the previous relativistic many-body calculations of C_6 dispersion coefficients [Phys.Rev. Lett. {\bf 82}, 3589 (1999)] to higher-multipole coefficients C_8 and C_10. A special attention is paid to usually omitted contribution of core-excited states. We calculate this contribution within relativistic random-phase approximation and demonstrate that for heavy atoms core excitations contribute as much as 10% to the dispersion coefficients. We tabulate results for both homonuclear and heteronuclear dimers and estimate theoretical uncertainties. The estimated uncertainties for C_8 coefficients range from 0.5% for Li_2 to 4% for Cs_2.
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"abstract": "We consider long-range interactions between two alkali-metal atoms in their\nrespective ground states. We extend the previous relativistic many-body\ncalculations of C_6 dispersion coefficients [Phys.Rev. Lett. {\\bf 82}, 3589\n(1999)] to higher-multipole coefficients C_8 and C_10. A special attention is\npaid to usually omitted contribution of core-excited states. We calculate this\ncontribution within relativistic random-phase approximation and demonstrate\nthat for heavy atoms core excitations contribute as much as 10% to the\ndispersion coefficients. We tabulate results for both homonuclear and\nheteronuclear dimers and estimate theoretical uncertainties. The estimated\nuncertainties for C_8 coefficients range from 0.5% for Li_2 to 4% for Cs_2.",
"arxiv_id": "physics/0303048",
"authors": [
"Sergey Porsev",
"Andrei Derevianko"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1063/1.1578052",
"title": "Accurate relativistic many-body calculations of van der Waals coefficients C_8 and C_10 for alkali-metal dimers",
"url": "https://arxiv.org/abs/physics/0303048"
},
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