dorsal/arxiv
View SchemaQuantum chaos in multicharged ions and statistical approach to the calculation of electron-ion resonant radiative recombination
| Authors | G. F. Gribakin, A. A. Gribakina, V. V. Flambaum |
|---|---|
| Categories | |
| ArXiv ID | physics/9811010 |
| URL | https://arxiv.org/abs/physics/9811010 |
| DOI | 10.1071/PH98093 |
Abstract
We show that the spectrum and eigenstates of open-shell multicharged atomic ions near the ionization threshold are chaotic, as a result of extremely high level densities of multiply excited electron states ($10^3 eV^{-1}$ in Au^{24+}) and strong configuration mixing. This complexity enables one to use statistical methods to analyse the system. We examine the dependence of the orbital occupation numbers and single-particle energies on the excitation energy of the system, and show that the occupation numbers are described by the Fermi-Dirac distribution, and temperature and chemical potential can be introduced. The Fermi-Dirac temperature is close to the temperature defined through the canonical distribution. Using a statistical approach we estimate the contribution of multielectron resonant states to the radiative capture of low-energy electrons by Au^{25+} and demonstrate that this mechanism fully accounts for the 10^2 times enhancement of the recombination over the direct radiative recombination, in agreement with recent experimental observations.
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"abstract": "We show that the spectrum and eigenstates of open-shell multicharged atomic\nions near the ionization threshold are chaotic, as a result of extremely high\nlevel densities of multiply excited electron states ($10^3 eV^{-1}$ in\nAu^{24+}) and strong configuration mixing. This complexity enables one to use\nstatistical methods to analyse the system. We examine the dependence of the\norbital occupation numbers and single-particle energies on the excitation\nenergy of the system, and show that the occupation numbers are described by the\nFermi-Dirac distribution, and temperature and chemical potential can be\nintroduced. The Fermi-Dirac temperature is close to the temperature defined\nthrough the canonical distribution. Using a statistical approach we estimate\nthe contribution of multielectron resonant states to the radiative capture of\nlow-energy electrons by Au^{25+} and demonstrate that this mechanism fully\naccounts for the 10^2 times enhancement of the recombination over the direct\nradiative recombination, in agreement with recent experimental observations.",
"arxiv_id": "physics/9811010",
"authors": [
"G. F. Gribakin",
"A. A. Gribakina",
"V. V. Flambaum"
],
"categories": [
"physics.atom-ph",
"cond-mat.mes-hall"
],
"doi": "10.1071/PH98093",
"title": "Quantum chaos in multicharged ions and statistical approach to the calculation of electron-ion resonant radiative recombination",
"url": "https://arxiv.org/abs/physics/9811010"
},
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