Atomic and Molecular Collisions Group

 Electron-impact Ionization Cross Sections

 

 

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Electron-Impact Ionization

 

 Please consult the original publications when using these data.

Atoms

 Target

 File Source
 He  e_He.txt 'Determination of the absolute partial and total cross sections for electron-impact ionization of the rare gases', Phys. Rev. A 65, 042713 (2002), R. Rejoub, B. G. Lindsay, and R. F. Stebbings.
 Ne  e_Ne.txt

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 Ar  e_Ar.txt

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 Kr  e_Kr.txt

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Xe  e_Xe.txt

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Molecules

 Target  File Source
 CCl4  e_CCl4.txt 'Electron-impact ionization of CCl4 and CCl2F2', J. Chem. Phys. 121, 1350-1356 (2004), B. G. Lindsay, K. F. McDonald, W. S. Yu, R. F. Stebbings, and F. B. Yousif.
 CCl2F2  e_CCl2F2.txt

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 CF4  e_CF4.txt 'Absolute partial cross sections for electron-impact ionization of CF4 from threshold to 1000 eV', J. Phys. B: At. Mol. Opt. Phys. 34, 799-809 (2001), D. R. Sieglaff, R. Rejoub, B. G. Lindsay, and R. F. Stebbings.
 CH3Br  e_CH3Br.txt  'Electron-impact ionization of the methyl halides', J. Chem. Phys. 117, 6450-6454 (2002), R. Rejoub, B. G. Lindsay, and R. F. Stebbings.
 CH3Cl  e_CH3Cl.txt

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 CH3F  e_CH3F.txt

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 CH3I  e_CH3I.txt

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 CH4  e_CH4.txt [Note] 'Absolute partial cross sections for electron-impact ionization of CH4 from threshold to 1000 eV', J. Chem. Phys. 106, 4430-4435 (1997), H. C. Straub, D. Lin, B. G. Lindsay, K. A. Smith, and R. F. Stebbings.
 CH3OH  e_CH3OH.txt 'Electron-impact ionization of the simple alcohols', J. Chem. Phys. 118, 1756-1760 (2003), R. Rejoub, C. D. Morton, B. G. Lindsay, and R. F. Stebbings.
 C2H5OH  e_C2H5OH.txt

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 C3H7OH  e_C3H7OH.txt

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 CO  e_CO.txt 'Absolute partial cross sections for electron-impact ionization of CO from threshold to 1000 eV', J. Phys. B: At. Mol. Opt. Phys. 33, 3225-3234 (2000), M. A. Mangan, B. G. Lindsay, and R. F. Stebbings.
 CO2  e_CO2.txt [Note] 'Absolute partial cross sections for electron-impact ionization of CO2 from threshold to 1000 eV', J. Chem. Phys. 105, 4015-4022 (1996), H. C. Straub, B. G. Lindsay, K. A. Smith, and R. F. Stebbings.
 CS2  e_CS2.txt 'Absolute cross sections for electron-impact ionization of N2O, H2S, and CS2 from threshold to 1000 eV', J. Chem. Phys. 118, 5894-5900 (2003), B. G. Lindsay, R. Rejoub, and R. F. Stebbings.
 H2  e_H2.txt [Note] 'Absolute partial cross sections for electron-impact ionization of H2, N2, and O2 from threshold to 1000 eV', J. Phys. Rev. A 54, 2146-2153 (1996), H. C. Straub, P. Renault, B. G. Lindsay, K. A. Smith, and R. F. Stebbings.
 H2O/D2O  e_H2O.txt [Note] 'Absolute partial cross sections for electron-impact ionization of H2O and D2O from threshold to 1000 eV', J. Chem. Phys. 108, 109-116 (1998), H. C. Straub, B. G. Lindsay, K. A. Smith, and R. F. Stebbings.
 H2S  e_H2S.txt 'Absolute cross sections for electron-impact ionization of N2O, H2S, and CS2 from threshold to 1000 eV', J. Chem. Phys. 118, 5894-5900 (2003), B. G. Lindsay, R. Rejoub, and R. F. Stebbings.
 NH3/ND3  e_NH3.txt 'Electron-impact ionization of NH3 and ND3', J. Chem. Phys. 115, 5053-5058 (2001), R. Rejoub, B. G. Lindsay, and R. F. Stebbings.
 N2  e_N2.txt [Note]  'Absolute partial cross sections for electron-impact ionization of H2, N2, and O2 from threshold to 1000 eV', J. Phys. Rev. A 54, 2146-2153 (1996), H. C. Straub, P. Renault, B. G. Lindsay, K. A. Smith, and R. F. Stebbings.
 N2O  e_N2O.txt 'Absolute cross sections for electron-impact ionization of N2O, H2S, and CS2 from threshold to 1000 eV', J. Chem. Phys. 118, 5894-5900 (2003), B. G. Lindsay, R. Rejoub, and R. F. Stebbings.
 NO  e_NO.txt 'Absolute partial cross sections for electron-impact ionization of NO and NO2 from threshold to 1000 eV', J. Chem. Phys. 112, 9404-9410 (2000), B. G. Lindsay, M. A. Mangan, H. C. Straub, and R. F. Stebbings.
NO2  e_NO2.txt

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O2  e_O2.txt [Note] 'Absolute partial cross sections for electron-impact ionization of H2, N2, and O2 from threshold to 1000 eV', J. Phys. Rev. A 54, 2146-2153 (1996), H. C. Straub, P. Renault, B. G. Lindsay, K. A. Smith, and R. F. Stebbings.
SF6  e_SF6.txt 'Absolute partial cross sections for electron-impact ionization of SF6 from threshold to 1000 eV', J. Phys. B: At. Mol. Opt. Phys. 34, 1289-1297 (2001), R. Rejoub, D. R. Sieglaff, B. G. Lindsay, and R. F. Stebbings.
 SO2  e_SO2.txt [Note]  'Absolute partial cross sections for electron impact ionization of SO2 from threshold to 1000 eV', J. Geophys. Res. 101, 21151-21156 (1996), B. G. Lindsay, H. C. Straub, K. A. Smith, and R. F. Stebbings.

 

Notes:

  • The first column in each table is the electron energy in eV; the second column is the absolute partial cross section for production of the heaviest ionic species (usually in units of 10-16 cm2); the third column is the uncertainty in this cross section. The next two columns are for the next heaviest species and so on.
  • Note that the data tabulated here for H2, N2, O2, CO2, SO2, CH4, and H2O reflect a recent recalibration of the apparatus and thus differ slightly from those given in the original publications.

 

 

 
 


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Updated September 2, 2004