Details

Autor(en) / Beteiligte

• Harabati, C
• Berengut, J C
• Flambaum, V V
• Dzuba, V A

Titel

Electron recombination with tungsten ions with open f-shells

Ist Teil von

• Journal of physics. B, Atomic, molecular, and optical physics, 2017-06, Vol.50 (12), p.125004

Ort / Verlag

IOP Publishing

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We calculate the electron recombination rates with target ions W q + , q = 18-25, as functions of electron energy and electron temperature (i.e. the rates integrated over the Maxwellian velocity distribution). Comparison with available experimental data for W 18 + , W 19 + , and W 20 + is used as a test of our calculations. Our predictions for W 21 + , W 22 + , W 23 + , W 24 + , and W 25 + (where the experimental data are not available) may be used for plasma modeling in thermonuclear reactors. The results for the temperature-dependent rates for each ion are fitted with the standard analytical expressions to make them easy to use. All of these ions have an open electron f-shell and an extremely dense spectrum of chaotic many-electron compound resonances, which enhance the recombination rates by 2-3 orders of magnitude in comparison with the direct electron recombination. Conventional dielectronic recombination theory is not directly applicable in this case. Instead, we developed a statistical theory based on the properties of chaotic eigenstates. This theory describes a multi-electronic recombination (extension of the dielectronic recombination) via many-excited-electron compound resonances.