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166 results on '"Tabata, Tatsuo"'

61. ANALYTIC CROSS SECTIONS FOR ELECTRON COLLISIONS WITH HYDROCARBONS: CH4, C2H6, C2H4, C2H2, C3H8, AND C3H6

Author

SHIRAI, TOSHIZO, TABATA, TATSUO, TAWARA, HIROYUKI, and ITIKAWA, YUKIKAZU

Subjects
*COLLISIONS (Nuclear physics), *HYDROCARBONS
Abstract

Cross sections for 138 processes in collisions of electrons with hydrocarbons, based on available literature sources, are critically compiled. The literature has been surveyed up to September 2000. A short comment is given for each measurement. The recommended data sets are presented in separate graphs for each process. Analytic fits to the recommended cross sections are also presented. [Copyright &y& Elsevier]

Published
2002
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62. Analytic cross sections for charge transfer of hydrogen atoms and ions colliding with metal vapors

Author

Masao Sataka, Yohta Nakai, Tabata Tatsuo, Toshio Sugiura, Ito Rinsuke, and Toshizo Shirai

Subjects
Nuclear and High Energy Physics, Hydrogen, Chemistry, Projectile, Atoms in molecules, chemistry.chemical_element, Charge (physics), Type (model theory), Ion, Metal, Cross section (physics), visual_art, visual_art.visual_art_medium, Atomic physics, Instrumentation
Abstract

Analytic formulas are given for the total cross sections, σ, for the charge transfer in collisions of H + , H − and H with metal vapors. The cross sections considered are σ 10 , σ 0−1 , σ 1−1 , σ 01 , σ −10 , and σ −11 , where the subscripts represent the initial and the final charge state of the projectile. The functional form of the formulas is a modification of the semiempirical formula proposed by Green and McNeal for σ 10 of H + in gaseous atoms and molecules. Values of adjustable parameters in the formulas have been determined by least-squares fits to a compiled set of experimental data. The root-mean-square deviation of the data from the formula is from 7 to 34% for each type of cross section. The main cause of larger deviations is the discrepancy among the data.

Published
1988

63. ANALYTIC CROSS SECTIONS FOR ELECTRON COLLISIONS WITH CO, CO 2 , AND H 2 O RELEVANT TO EDGE PLASMA IMPURITIES

Author

SHIRAI, TOSHIZO, TABATA, TATSUO, and TAWARA, HIROYUKI

Abstract

Cross section data in the energy range above 1 eV have been critically evaluated for electron impact collision processes involving the impurity species (CO, CO 2 , and H 2 O) most relevant to low-temperature plasmas. A short review of the cross section measurements is given for each collision process. The literature has been surveyed up to December 1999. Analytic fits to the recommended cross sections are also presented.

Published
2001
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64. ANALYTIC CROSS SECTIONS FOR COLLISIONS OF H+, H2+, H3+, H, H2, AND H−WITH HYDROGEN MOLECULES

Author

TABATA, TATSUO and SHIRAI, TOSHIZO

Abstract

Analytic expressions fitted to cross section data on collisions of H+, H+2, H3+, H, H2, and H−with H2are given. The data used are those recommended by Phelps [J. Chem. Phys. Ref. Data 19, 653 (1990)] and additional experimental data, when available, up to a projectile energy of about 100 keV, including new kinds of reactions not treated by Phelps. The analytic expressions are of the semiempirical functional forms proposed by Green and McNeal [J. Geophys. Res. 76, 133 (1971)] and modifications of these, thus making it possible not only to interpolate but also to extrapolate the data to some extent.

Published
2000
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