Partial ionization cross sections of noble gases for electrons with energy 0.5–16 keV.

Schram, B.L.; Boerboom, A.J.H.; Kistemaker, J.

doi:10.1016/0031-8914(66)90115-7

Cited by 167 publications

(104 citation statements)

References 17 publications

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“…We used the Ne-K-ionization cross sections for proton [24][25][26] lized to a mean value at E=145keV) and the a(Ne 2+) data from Solovev et al [1] and Wexler [2] (extrapolated in the energy range 180 keV_< E < 800 keV) have been taken. In the case of electron impact the a(Ne +) and o-(Ne 2 § data of Schram et al [3] have been used, which are in good agreement with new absolute measurements of Nagy et al E4]. The absolute accuracy of the present a(2p 5) and a(2p 4) data is mainly determined by those of the a(Ne +) and o'(Ne z+) data, i.e.…”

Section: Measurements and Data Reductionsupporting

confidence: 53%

Single and double ionization of neon 2s- and 2p-subshells by proton and electron impact

Eckhardt

Schartner

1983

Z Physik A

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Absolute single and double ionization cross sections of neon 2s-and 2p-subshells for proton (40-900 keV) and electron impact (0.2-10 keV) have been measured using photon spectroscopy in the spectral range of the vacuum ultraviolet. Cross sections for double ionization decrease more rapidly with increasing impact energy than cross sections for single ionization. No definite asymptotic energy dependence of a Bethe-Fano-plot could be found for double ionization in contrast to single ionization. The experimental results are compared with theoretical predictions of the shake-off model and Gryzinski's classical binary encounter theory. Better agreement is found with the latter, indicating that successive binary collisions have to be considered as a strong mechanism for double ionization by protons or electrons of the investigated energy range. Comparison is made with other experimental results for double ionization by photon impact or capture ionization by proton impact.

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Section: Measurements and Data Reductionsupporting

confidence: 53%

Single and double ionization of neon 2s- and 2p-subshells by proton and electron impact

Eckhardt

Schartner

1983

Z Physik A

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“…The discrepancy is possibly due to the contribution to the EIMI cross section of other indirect ionization processes, such as MIMA. We should also note that for quintuple ionization, there is a very large discrepancy of more than a factor of two between the measurements of Schram et al (1966) and Almeida et al (1995). The Schram et al (1966) results appear to be systematically low for all of the neon EIMI data (compare Figures 8 and 9), so we base the branching ratio above on the Almeida et al (1995) measurements.…”

Section: Ne-likementioning

confidence: 99%

“…We should also note that for quintuple ionization, there is a very large discrepancy of more than a factor of two between the measurements of Schram et al (1966) and Almeida et al (1995). The Schram et al (1966) results appear to be systematically low for all of the neon EIMI data (compare Figures 8 and 9), so we base the branching ratio above on the Almeida et al (1995) measurements. We describe the direct quadruple ionization cross section using Equation (2) with p 0 ≈ 2.2 and the direct quintuple ionization is modeled with Equation (1) scaled by a factor of f = 0.005 to match the cross section below the IA threshold.…”

Section: Ne-likementioning

confidence: 99%

“…Quintuple ionization of Ne 0+ forming Ne 5+ . The filled squares show the measurements of Schram et al (1966) and the filled diamonds those of Almeida et al (1995). The solid curve is our model of the data as described in Section 3.9.…”

Section: Summary and Future Needsmentioning

confidence: 99%

“…Although developed for double ionization cross sections, it fits these triple ionization data well. Schram et al (1966), the filled circles those of Lebius et al (1989), and the filled diamonds those of Almeida et al (1995). The solid curve is our model of the data as described in Section 3.9.…”

Section: Summary and Future Needsmentioning

confidence: 99%

See 2 more Smart Citations

Electron-impact Multiple-ionization Cross Sections for Atoms and Ions of Helium through Zinc

Hahn

Müller

Savin

2017

ApJ

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We have compiled a set of electron-impact multiple ionization (EIMI) cross sections for astrophysically relevant ions. EIMI can have a significant effect on the ionization balance of non-equilibrium plasmas. For example, it can be important if there is a rapid change in the electron temperature or if there is a non-thermal electron energy distribution, such as a kappa distribution. Cross sections for EIMI are needed in order to account for these processes in plasma modeling and for spectroscopic interpretation.Here, we describe our comparison of proposed semiempirical formulae to the available experimental EIMI cross section data. Based on this comparison, we have interpolated and extrapolated fitting parameters to systems that have not yet been measured. A tabulation of the fit parameters is provided for 3466 EIMI cross sections. We also highlight some outstanding issues that remain to be resolved.

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Mass Spectrometric Determination of Partial Ionization Cross Sections

Märk

1982

Contrib Plasma Phys

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A review of the measurement of partial electron impact ionization cross sections for rare gas atoms and molecules is presented, with particular regard t o the low electron energy regime ( < 200 eV). Recently developed experimental techniques are surveyed. Predictions of quantd and classical approximations as well as some empirical formulae are compared with the experimental data. In coiiclusion a set of recommended atomic ionization cross sections is given for electron energies ranging from threshold up to 14 keV. Finally, the existence 2nd measured rippearnnce potentials for the production of doubly ionized rare gas dimers are discussed.

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Partial ionization cross sections of noble gases for electrons with energy 0.5–16 keV.

Cited by 167 publications

References 17 publications

Single and double ionization of neon 2s- and 2p-subshells by proton and electron impact

Single and double ionization of neon 2s- and 2p-subshells by proton and electron impact

Electron-impact Multiple-ionization Cross Sections for Atoms and Ions of Helium through Zinc

Mass Spectrometric Determination of Partial Ionization Cross Sections

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