Experimental investigation of the asymmetric charge exchange reaction in the Ar+-Ni system in the afterglow of a pulsed glow discharge

I. Korolov, Gregor Bánó, Z. Donkó

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Abstract

We have carried out spectroscopic measurements in the afterglow of pulsed glow discharges in Ar and in He-Ar mixtures to investigate elementary processes between Ar+ ions and Ni atoms. The emission spectra in the afterglow showed a possibility of asymmetric charge transfer excitation of Ni II levels lying up to 1.6 eV energy difference below the Ar+ ion level. For the rate coefficient of this reaction between Ar+(2P 3/2) ions and Ni atoms we obtained a value kCT = 2.3 (± 0.9) × 10- 9 cm3 s- 1, for room temperature, T = 300 K, conditions. For the reaction involving Ar +(2P1/2) ions our measurements made it possible to derive an upper bound of k*CT ≤ 3.3 (± 1.6) × 10- 9 cm3 s- 1. Via measuring the time-dependence of the intensities of several Ni II spectral lines with different upper level energies we also obtained an upper bound for the rate of the superelastic scattering of electrons with Ar+(2P 1/2) ions, as keQ ≤ 1.3 (± 0.8) × 10 - 9 cm3 s- 1.

Original languageEnglish
Pages (from-to)706-711
Number of pages6
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume66
Issue number9-10
DOIs
Publication statusPublished - Sep 2011

Fingerprint

Glow discharges
afterglows
charge exchange
glow discharges
Ions
ions
Atoms
Electron energy levels
time dependence
line spectra
atoms
Charge transfer
emission spectra
energy levels
charge transfer
Scattering
Electrons
room temperature
coefficients
scattering

Keywords

  • Asymmetric charge transfer
  • Glow discharge
  • Reaction rate constant
  • Superelastic collision

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics
  • Analytical Chemistry
  • Spectroscopy

Cite this

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title = "Experimental investigation of the asymmetric charge exchange reaction in the Ar+-Ni system in the afterglow of a pulsed glow discharge",
abstract = "We have carried out spectroscopic measurements in the afterglow of pulsed glow discharges in Ar and in He-Ar mixtures to investigate elementary processes between Ar+ ions and Ni atoms. The emission spectra in the afterglow showed a possibility of asymmetric charge transfer excitation of Ni II levels lying up to 1.6 eV energy difference below the Ar+ ion level. For the rate coefficient of this reaction between Ar+(2P 3/2) ions and Ni atoms we obtained a value kCT = 2.3 (± 0.9) × 10- 9 cm3 s- 1, for room temperature, T = 300 K, conditions. For the reaction involving Ar +(2P1/2) ions our measurements made it possible to derive an upper bound of k*CT ≤ 3.3 (± 1.6) × 10- 9 cm3 s- 1. Via measuring the time-dependence of the intensities of several Ni II spectral lines with different upper level energies we also obtained an upper bound for the rate of the superelastic scattering of electrons with Ar+(2P 1/2) ions, as keQ ≤ 1.3 (± 0.8) × 10 - 9 cm3 s- 1.",
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author = "I. Korolov and Gregor B{\'a}n{\'o} and Z. Donk{\'o}",
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T1 - Experimental investigation of the asymmetric charge exchange reaction in the Ar+-Ni system in the afterglow of a pulsed glow discharge

AU - Korolov, I.

AU - Bánó, Gregor

AU - Donkó, Z.

PY - 2011/9

Y1 - 2011/9

N2 - We have carried out spectroscopic measurements in the afterglow of pulsed glow discharges in Ar and in He-Ar mixtures to investigate elementary processes between Ar+ ions and Ni atoms. The emission spectra in the afterglow showed a possibility of asymmetric charge transfer excitation of Ni II levels lying up to 1.6 eV energy difference below the Ar+ ion level. For the rate coefficient of this reaction between Ar+(2P 3/2) ions and Ni atoms we obtained a value kCT = 2.3 (± 0.9) × 10- 9 cm3 s- 1, for room temperature, T = 300 K, conditions. For the reaction involving Ar +(2P1/2) ions our measurements made it possible to derive an upper bound of k*CT ≤ 3.3 (± 1.6) × 10- 9 cm3 s- 1. Via measuring the time-dependence of the intensities of several Ni II spectral lines with different upper level energies we also obtained an upper bound for the rate of the superelastic scattering of electrons with Ar+(2P 1/2) ions, as keQ ≤ 1.3 (± 0.8) × 10 - 9 cm3 s- 1.

AB - We have carried out spectroscopic measurements in the afterglow of pulsed glow discharges in Ar and in He-Ar mixtures to investigate elementary processes between Ar+ ions and Ni atoms. The emission spectra in the afterglow showed a possibility of asymmetric charge transfer excitation of Ni II levels lying up to 1.6 eV energy difference below the Ar+ ion level. For the rate coefficient of this reaction between Ar+(2P 3/2) ions and Ni atoms we obtained a value kCT = 2.3 (± 0.9) × 10- 9 cm3 s- 1, for room temperature, T = 300 K, conditions. For the reaction involving Ar +(2P1/2) ions our measurements made it possible to derive an upper bound of k*CT ≤ 3.3 (± 1.6) × 10- 9 cm3 s- 1. Via measuring the time-dependence of the intensities of several Ni II spectral lines with different upper level energies we also obtained an upper bound for the rate of the superelastic scattering of electrons with Ar+(2P 1/2) ions, as keQ ≤ 1.3 (± 0.8) × 10 - 9 cm3 s- 1.

KW - Asymmetric charge transfer

KW - Glow discharge

KW - Reaction rate constant

KW - Superelastic collision

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