Ionization and Charge Transfer in Proton-Hydrogen Atom Collisions

Fite, W. L.; Stebbings, R. F.; Hummer, D. G.; Brackmann, R. T.

doi:10.1103/physrev.119.663

Cited by 242 publications

(44 citation statements)

References 15 publications

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“…The charge exchange lifetimes as measured by Fite, et al (1960) are shortest in the proton energy ranae 5-30 keV.…”

Section: Decay Mechanismmentioning

confidence: 99%

“…1968;Russell and Thorne, 1970) on the charge exchange question and was therefore selected on the basis of its historical merit. In his calculation Liemohn used the experimentally measured cross section for charge exchange of p rotons and atomic hydrogen (Fite, et a_'.., 1960) for the rinq current energies of interest, thereby determining the energy dependence of the char g e exchange mechanism, and he used the hydrogen density model of Johnson and Fish (1960) to estimate the neutral h y drogen environment, thus providing the L-value dependence.…”

Section: Decay Mechanismmentioning

confidence: 99%

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Ring current proton decay by charge exchange

Smith

Hoffman

Fritz³

1976

J. Geophys. Res.

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Explorer 45 (S 3 -A) measurements during the recover y phase (,f a moderate magnet;; storm have confirmed that the char g e exchange decay mechanism can account f or the decay of the storm-time proton ring current. The moderate mannetic storm of 24 February 1972 was selected for study since a svi mccric ring current hr , developed and effects due to asymmetric rin g current losses ^o!-a eliminated.In this study it was found that after the initial rapid deca y of the p roton flux, which is a consequence of the dissipation of the asymmetric ring current, the equatorially mirroring protons in the energy range 5-30 keV decayed throu q hout the L-value ran g e of 3.5 to 5.0 at the r '-arge exchange decay rate calculated by Liemohn (1961).After several days of decay, the proton fluxes reached a lower limit where an ap p arent equilibrium was maintained, between weak particle source mechanisms and the loss mechanisms, until fresh protons were injected into the rinq curr-nt renion durin q substorms. blhile other proton loss mechanisms may also be operating, the results indicate that charge exchange can entirely account for the storm-time proton ring current decay, and that this mechanism must be considered in all studies involving the loss of proton rinq current particles.

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“…The charge exchange lifetimes as measured by Fite, et al (1960) are shortest in the proton energy ranae 5-30 keV.…”

Section: Decay Mechanismmentioning

confidence: 99%

Section: Decay Mechanismmentioning

confidence: 99%

Ring current proton decay by charge exchange

Smith

Hoffman

Fritz³

1976

J. Geophys. Res.

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“…Consequently the slight adjustment of A to the theoretical value was made, and the other parameters varied to fit the data. The resulting Fite (1960); 0, Gilbody and Ireland (1963); 0, Park et al (1977); A, Shah and Gilbody (1981); 0, Park (1983).…”

Section: Atomic Hydrogenmentioning

confidence: 99%

“…The solid curve is the recommended fit; the dashed curve is the DWBA calculation. Experimental data points: V, Fite (1960); 0 , Gilbody and Ireland (1963);0, Park et al (1977); A, Shah and Gilbody (1981); 0, Park (1983). Keene (1949); 0 , Gilbody and Hasted (1957) and Gilbody and Lee (1963); A, Fedorenko et al (1960); + , Hooper (1961); 0, Solov'ev et al (1962); a, Rudd and Jorgensen (1963);@, De Heer et al (1966);x, Desesquelles et al (1966); '$+, Rudd et al (1966) and Rudd and Madison (1976); @ ( E , 2 1000 keV), Pivovar and Levchenko (1967);n (Ep 5 100 keV), Becker and Scharmann (1969); 0, Puckett and Martin (1970); e, Stolterfoht (1971a); @ (Ep < 11 keV), Latypov and Shaporenko (1973); @, Toburen, from Rudd et al (1976); B, Manson et al, from Rudd et a2.…”

Section: Heliummentioning

confidence: 99%

Electron production in proton collisions: total cross sections

et al. 1985

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Existing data on the ionization of neutral atoms and molecules by proton impact are reviewed, and electron production cross-section data are collected. The three major experimental methods are discussed and possible sources of error identified. Some theoretical cross sections are discussed, and well-established methods of relating them to measured cross sections are reviewed. A mathematical equation is fitted to the weighted experimental data for each target, and these fits are adjusted to be consistent with appropriate theoretical calculations and with electron impact and photoionization data. Recommended values of total cross sections for proton-impact ionization are given.

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“…The experimental points are from the Pederson et al, group at Aarhus. squares, Fite et al, (1960); circles, Gilbody and Ireland (1963). …”

Section: (7a)mentioning

confidence: 99%