DOI: 10.1063/1.1726956. Electron Attachment and Detachment. I. Pure O2 at Low Energy

Electron Attachment and Detachment. I. Pure O2 at Low Energy

10.1063/1.1726956

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Electron attachment and detachment coefficients are reported for pure oxygen from analyses of the current waveforms observed in drift-tube experiments. The results are consistent with the identification of the negative ion as O2− with an electron affinity of 0.43±0.02 eV. The two-body collisional detachment coefficient for O2− in thermal equilibrium with the gas increases from 9×10−17 cm3/sec at 375°K to 1.4×10−14 cm3/sec at 575°K. The three-body attachment coefficient for thermal electrons increases from 2.0±0.2×10−30 cm6/sec at 300°K to 2.8±0.5×10−30 cm6/sec at 530°K. The O2− ions are found to survive at least 3×108 elastic collisions without de-excitation and so are believed to be in their lowest vibrational state. At low oxygen densities the current of detached electrons is separated from the negative-ion current by applying a high-frequency voltage to the control grid. At high oxygen densities the electrons and negative ions cross the tube in a narrow pulse at a drift velocity determined by the equilibrium concentrations of electrons and ions.

Bibliography

Pack, J. L., & Phelps, A. V. (1966). Electron Attachment and Detachment. I. Pure O2 at Low Energy. The Journal of Chemical Physics, 44(5), 1870â1883.

Authors 2

J. L. Pack (first)
A. V. Phelps (additional)

References 55 Referenced 206

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Dates

Type	When
Created	20 years, 7 months ago (Jan. 9, 2005, 3:17 a.m.)
Deposited	1 year, 6 months ago (Feb. 8, 2024, 7:45 p.m.)
Indexed	1 month, 1 week ago (July 26, 2025, 4:51 a.m.)
Issued	59 years, 6 months ago (March 1, 1966)
Published	59 years, 6 months ago (March 1, 1966)
Published Print	59 years, 6 months ago (March 1, 1966)

Funders 0

None

BibTeX

@article{Pack_1966, title={Electron Attachment and Detachment. I. Pure O2 at Low Energy}, volume={44}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1726956}, DOI={10.1063/1.1726956}, number={5}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Pack, J. L. and Phelps, A. V.}, year={1966}, month=mar, pages={1870–1883} }

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  "abstract": "<jats:p>Electron attachment and detachment coefficients are reported for pure oxygen from analyses of the current waveforms observed in drift-tube experiments. The results are consistent with the identification of the negative ion as O2\u2212 with an electron affinity of 0.43\u00b10.02 eV. The two-body collisional detachment coefficient for O2\u2212 in thermal equilibrium with the gas increases from 9\u00d710\u221217 cm3/sec at 375\u00b0K to 1.4\u00d710\u221214 cm3/sec at 575\u00b0K. The three-body attachment coefficient for thermal electrons increases from 2.0\u00b10.2\u00d710\u221230 cm6/sec at 300\u00b0K to 2.8\u00b10.5\u00d710\u221230 cm6/sec at 530\u00b0K. The O2\u2212 ions are found to survive at least 3\u00d7108 elastic collisions without de-excitation and so are believed to be in their lowest vibrational state. At low oxygen densities the current of detached electrons is separated from the negative-ion current by applying a high-frequency voltage to the control grid. At high oxygen densities the electrons and negative ions cross the tube in a narrow pulse at a drift velocity determined by the equilibrium concentrations of electrons and ions.</jats:p>",
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    "1089-7690"
  ],
  "subject": [],
  "published-other": {
    "date-parts": [
      [
        1966,
        3,
        1
      ]
    ]
  },
  "published": {
    "date-parts": [
      [
        1966,
        3,
        1
      ]
    ]
  }
}