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Shyn, T. W.; Sharp, William; Kim, Y.-K.

doi:10.1103/physreva.24.79

Cited by 46 publications

(25 citation statements)

References 15 publications

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“…[32] with small corrections. We use an experimentally determined doubly differential crosssection for the electron impact ionization of hydrogen [33,34]. Electron elastic scattering and hydrogen electronic excitations, and angular scattering data taken from [35].…”

Section: Hydrogenmentioning

confidence: 99%

Exploring the electron density in plasma induced by EUV radiation: II. Numerical studies in argon and hydrogen

Astakhov

Goedheer

Lee

et al. 2016

J. Phys. D: Appl. Phys.

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We used numerical modeling to study the evolution of EUV-induced plasmas in argon and hydrogen. The results of simulations were compared to the electron densities measured by microwave cavity resonance spectroscopy. It was found that the measured electron densities can be used to derive the integral amount of plasma in the cavity. However, in some regimes, the impact of the setup geometry, EUV spectrum, and EUV induced secondary emission should be taken into account. The influence of these parameters on the generated plasma and the measured electron density is discussed.

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Section: Hydrogenmentioning

confidence: 99%

Exploring the electron density in plasma induced by EUV radiation: II. Numerical studies in argon and hydrogen

Astakhov

Goedheer

Lee

et al. 2016

J. Phys. D: Appl. Phys.

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“…8. Two sets of experimental data are available at this incident energy, those by Shyn et al [41] (filled circles) and those by DuBois and Rudd [42] (filled triangles). Both sets of experimental data indicate a departure from the expected shape for slow secondary electrons, W < : 10 eV.…”

Section: Hydrogen Moleculementioning

confidence: 99%

Binary-encounter-dipole model for electron-impact ionization

1994

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A theoretical model, which is free of adjustable or fitted parameters, for calculating electronimpact ionization cross sections for atoms and molecules is presented. This model combines the binary-encounter theory with the dipole interaction of the Bethe theory for fast incident electrons. The ratios of the contributions from distant and close collisions and interference between the direct and exchange terms are determined by using the asymptotic behaviors predicted by the Bethe theory for ionization and for stopping cross sections. Our model prescribes procedures to calculate the singly differential cross section (energy distribution) for each subshell using the binding energy, average kinetic energy, and the differential dipole oscillator strengths for that subshell. Then the singly differential cross section is integrated over the ejected electron energy to obtain the total ionization cross section. The resulting total ionization cross section near the threshold is proportional to the excess energy of the projectile electron. We found that this model yields total ionization cross sections for a variety of atoms and molecules from threshold to several keV which are in good agreement (-10% or better on average) with known experimental results. The energy distributions also exhibit the expected shapes and magnitudes. We offer a simpler version of the model that can be used when differential oscillator strengths are not known. For the ionization of ions with an openshell configuration, we found that a minor modification of our theory greatly improves agreement with experiment. PACS number(s): 34.80. Dp, 34.80.Gs, 34.80.K~

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“…To the best of our knowledge, there are no existing experimental results with which to make comparisons of the present results, while the total PSDCS values for some molecules have also been studied by Opal et al, 21 Rudd et al 22 and Shyn et al. 23 In a similar way as for other molecules, we have calculated the partial ionization cross sections (PICS) of SO 2 by electron impact with energies varying from ionization threshold to 10 keV, by integration of PSDCS with respect to the energy loss W (or the secondary electron energy element P). Thus, the calculated results for PICS and the total single SO 2 ionization cross sections derived from the calculated PICS are in satisfactory agreement with the available theoretical data 7,11 and experimental data 5,[8][9][10][11] within the experimental uncertainties.…”

mentioning

confidence: 73%

Partial differential cross sections for the ionization of the SO2 molecule by electron impact

Pal¹,

Prakash²

1998

Rapid Commun. Mass Spectrom.

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Doubly differential cross sections of secondary electrons ejected from gases by electron impact: 25-250 eV onH2

Cited by 46 publications

References 15 publications

Exploring the electron density in plasma induced by EUV radiation: II. Numerical studies in argon and hydrogen

Exploring the electron density in plasma induced by EUV radiation: II. Numerical studies in argon and hydrogen

Binary-encounter-dipole model for electron-impact ionization

Partial differential cross sections for the ionization of the SO2 molecule by electron impact

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