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Measurement of the photodetachment cross section of the negative ion of fluorine

1987; American Institute of Physics; Volume: 35; Issue: 4 Linguagem: Inglês

10.1103/physreva.35.1615

0556-2791

S. Vacquié, Alain Gleizes, Mohamad Sabsabi,

Laser-induced spectroscopy and plasma

The photodetachment cross section of ${\mathrm{F}}^{\mathrm{\ensuremath{-}}}$ was obtained experimentally from a stationary arc plasma of ${\mathrm{SF}}_{6}$ at atmospheric pressure. The temperature was determined by spectroscopy. The electron number density was measured by two-wavelength laser interferometry and by emission spectroscopy. Departures from local thermodynamic equilibrium were taken into account. The variations of the photodetachment cross section of ${\mathrm{F}}^{\mathrm{\ensuremath{-}}}$ versus wavelength were obtained by measuring the absolute intensity of the continuum radiation emitted by the plasma and are compared with results from the literature.