H + Ar collisions. I. Experimental charge-production cross sections

Zyl, B. Van; Le, T.Q.; Neumann, H; Amme, Robert C.

doi:10.1103/physreva.15.1871

Cited by 32 publications

(9 citation statements)

References 23 publications

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“…Here their cross sections can exhibit surprisingly detailed structures as a function of H‐atom energy. We have found such striking behavior for H‐atom impact on Ar [ Van Zyl et al , ], N 2 and O 2 [ Van Zyl et al , ], H 2 [ Van Zyl et al , ], and other H atoms [ Gealy and Van Zyl , ], down to H energies of only 0.05 keV. But such structures persist down to even lower H energies, as nicely shown for rare‐gas‐atom targets by Aberle et al [].…”

Section: Introductionsupporting

confidence: 64%

“…As can be seen, the differences between the two data sets are very similar to the differences in the σ A /σ M ratios shown in Figure b. The σ 01 for both O and O 2 targets exhibits a rather smooth and rapid decrease with decreasing H‐atom energy, so typical of such ionization‐stripping reactions [ Van Zyl et al , ; Van Zyl et al , ; Van Zyl et al , ; and Gealy and Van Zyl , ].…”

Section: Results Of the Measurementsmentioning

confidence: 53%

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Cross sections for electron capture and loss by H⁺ and H impact on O and O₂

Zyl

Stephen

2014

JGR Space Physics

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Section: Introductionsupporting

confidence: 64%

Section: Results Of the Measurementsmentioning

confidence: 53%

Cross sections for electron capture and loss by H⁺ and H impact on O and O₂

Zyl

Stephen

2014

JGR Space Physics

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“…At energies below 10 ke V these cross sections are much smaller than those tabulated by Barnett at 01.,15 and somewhat smaller than those of Green and McNea1 12 and of Janev et a1. 11 We assume that each electron-production event results in single ionization of the target, but with an unknown ratio H+ to H2 + .…”

Section: H + -Hz Cross Sectionsmentioning

confidence: 99%

Cross Sections and Swarm Coefficients for H+, H2+, H3+, H, H2, and H− in H2 for Energies from 0.1 eV to 10 keV

Phelps

1990

Journal of Physical and Chemical Reference Data

325

108

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Graphical and tabulated data and the associated bibliography are presented tor cross sections for elastic, excitation and ionization collisions ofH+, H2 +, H3 +, H, H 2 , and Hwith H2 at laboratory energies from 0.1 to 10 keV. Where appropriate, drift velocities and reaction or excitation coefficients are calculated from the cross sections and recommended for use in analyses of swarm experiments and electrical discharges. In the case ofH+ in H 2 , cross sections for momentum transfer, rotational excitation, vibrational excitation, charge transfer, electronic excitation, and ionization are recommended. Energy-loss or stoppingpower coefficients calculated from these cross sections are much smaller than obtained from stopping-power theory. There are no relevant energy-loss experiments for H+ in H 2. Drift velocity calculations predict runaway for H+ in H2 for electric field to gas density ratiosE/ltgreatcrthan700Td,whcrc 1 Td (townsend) = 10-21 V w".ForH 2 + inH 2 • the cross sections include H3 + formation. charge transfer, vibrational and electronic excitation, and ionization. Drift velocities and average cross sections are calculated for E In> 1 kTd. For H3 + in H 2 • cross sections for momentum transfer. various charge transfer processes, electronic excitation, and ionization and drift velocities are recommended. In the case of H in H 2 • cross sections for momentum transfer, rotational excitation, vibrational excitation, charge transfer, H-formation, electronic excitation, and ionization are recommended. For H2 in H 2 , cross sections for momentum transfer, rotational excitation, vibrational excitation, charge transfer, electronic excitation, and ionization are recommended. In the case ofH-in H 2 , cross sections for momentum transfer, electron detachment, and ionization are recommended and calculated drift velocities are compared ~th experiment. Collisions of electronically excited states with H2 are not included.

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“…Also, in contrast to the N 2 and O 2 O-atom DCSs, which vary little with angle at 2 keV, Smith et al [15] found the analogous H-N 2 , and H-O 2 DCSs to fall off just as rapidly at 2 keV as at 5 keV. In a pair of related studies by Van Zyl et al [23] it was asserted that the functional forms of the electron-loss and direct-scattering DCSs are similar, except at small angles. This conclusion is, by and large, supported by the Smith et al [15] data for the targets that they studied also.…”

Section: Resultsmentioning

confidence: 96%

Electron capture and loss by kilo-electron-volt oxygen atoms in collisions with He,H2,N2, and
Lindsay
¹
,
Yu
²
,
McDonald
³

et al. 2004
Phys. Rev. A
18
1
14
0
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Absolute differential cross sections are reported for electron capture and loss by ͑1-5͒-keV oxygen atoms incident on He, H 2 , N 2 , and O 2 for scattering angles between 0.02°and 1.73°in the laboratory frame. The form of the differential cross sections is seen to vary significantly with energy and between different targets. Differences between the present O-atom electron-loss cross sections and those for H atoms reported previously imply that the underlying physical mechanism may not be the same. The integral cross sections, also reported here, are consistent with most previous studies. The consensus of the available electron-loss data suggests that the cross sections of Fogel et al. [Soviet Phys. JETP 35, 601 (1959)] are in error.

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H + Ar collisions. I. Experimental charge-production cross sections

Cited by 32 publications

References 23 publications

Cross sections for electron capture and loss by H⁺ and H impact on O and O₂

Cross sections for electron capture and loss by H⁺ and H impact on O and O₂

Cross Sections and Swarm Coefficients for H+, H2+, H3+, H, H2, and H− in H2 for Energies from 0.1 eV to 10 keV

Electron capture and loss by kilo-electron-volt oxygen atoms in collisions with He,H2,N2, and
Lindsay
¹
,
Yu
²
,
McDonald
³

et al. 2004
Phys. Rev. A
18
1
14
0
View full text Add to dashboard Cite

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H + Ar collisions. I. Experimental charge-production cross sections

Cited by 32 publications

References 23 publications

Cross sections for electron capture and loss by H+ and H impact on O and O2

Cross sections for electron capture and loss by H+ and H impact on O and O2

Cross Sections and Swarm Coefficients for H+, H2+, H3+, H, H2, and H− in H2 for Energies from 0.1 eV to 10 keV

Electron capture and loss by kilo-electron-volt oxygen atoms in collisions with He,H2,N2, andLindsay1, Yu2, McDonald3 et al. 2004Phys. Rev. A181140View full textAdd to dashboardCite

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Cross sections for electron capture and loss by H⁺ and H impact on O and O₂

Cross sections for electron capture and loss by H⁺ and H impact on O and O₂

Electron capture and loss by kilo-electron-volt oxygen atoms in collisions with He,H2,N2, and
Lindsay
¹
,
Yu
²
,
McDonald
³

et al. 2004
Phys. Rev. A
18
1
14
0
View full text Add to dashboard Cite