Integral cross sections for atomic hydrogen + hydrogen(0,0) .fwdarw. hydrogen(0,j') + hydrogen atom: comparison of quasiclassical and quantum results

1991 ◽  
Vol 95 (22) ◽  
pp. 8726-8731 ◽  
Author(s):  
M. E. Mandy ◽  
P. G. Martin
Keyword(s):  
Hydrogen Atom ◽  
Cross Sections ◽  
Atomic Hydrogen

Article

1998 ◽  
Vol 76 (2) ◽  
pp. 153-162
Author(s):  
P Kurunczi ◽  
K Becker ◽  
K Martus
Keyword(s):  
Hydrogen Atom ◽  
Organic Compounds ◽  
Cross Sections ◽  
Impact Energy ◽  
Atomic Hydrogen ◽  
Vacuum Ultraviolet ◽  
The Other ◽  
Dissociative Excitation ◽  
Balmer Series ◽  
Break Up

The vacuum ultraviolet (VUV) emissions of the hydrogen Lyman series following the dissociative excitation of the Si-organic compounds tetraethoxysilane (TEOS), tetramethylsilane (TMS), and hexamethyldisiloxane (HMDSO) by controlled electron impact were analyzed. Absolute photoemission cross sections from threshold to 200 eV and appearance potentials were determined for the Lyman-α and Lyman-β emissions for each of the three targets. The measured apparent emission cross sections at 100 eV impact energy for the Lyman-α lines are 6.0 x 10-19 cm2 for TMS, 6.5 x 10-19 cm2 for HMDSO and 1.1 x 10-18 cm2 for TEOS. The apparent Lyman-α cross sections for all three targets contained significant cascade contributions from the H Balmer series. Detailed studies of the near threshold regions indicated that several break-up mechanisms of the parent molecules contribute to the emissions. The lowest onsets for HMDSO, and TEOS were attributed to the removal of a single excited atomic hydrogen atom in the n=2 state. Additional onsets at higher energies could not be uniquely correlated in all cases with a particular break-up channel and (or) cascading, since the other fragments in these processes were not identified. The Lyman-β apparent emission cross sections were also measured and we found values of 1.3 x 10-19 cm2 for TMS, 1.6 x 10-19 cm2 for HMDSO, and 2.0 x 10-19 cm2 for TEOS at an impact energy of 100 eV. PACS Nos. 52.20Fs and 34.80Gs

Emission cross sections for fully stripped carbon colliding with atomic hydrogen

1988 ◽  
Vol 8 (1) ◽  
pp. 57-61 ◽  
Author(s):  
R. Hoekstra ◽  
D. Ćirić ◽  
A. N. Zinoviev ◽  
Yu. S. Gordeev ◽  
F. J. Heer ◽  
...  
Keyword(s):  
Cross Sections ◽  
Atomic Hydrogen

Further investigations of charge exchange and electron detachment - I. Ion energies 3 to 40 keV - II. Ion energies 100 to 4000 eV

1955 ◽  
Vol 227 (1171) ◽  
pp. 466-486 ◽  
Keyword(s):  
Charge Transfer ◽  
Energy Range ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Hydrogen Ions ◽  
Electron Detachment ◽  
Rare Gases ◽  
Helium Ions ◽  
Ion Energies

This paper describes the measurement of charge transfer cross-sections for protons, molecular hydrogen ions and helium ions in the rare gases and hydrogen, and electron detachment cross-sections for negative atomic hydrogen ions in the rare gases. Part I describes the energy range 3 to 40 keV. In part II the energy range 100 to 4000 eV is described, and the results are discussed in terms of the pseudo-adiabatic hypothesis. Comparisons are made with other experimental results, and anomalous molecular cases are discussed in terms of reactions involving anti-bonding states.

Angular differential cross sections for excitation of atomic hydrogen to then=2level by proton impact

1980 ◽  
Vol 21 (3) ◽  
pp. 751-758 ◽  
Author(s):  
J. T. Park ◽  
J. E. Aldag ◽  
J. L. Peacher ◽  
J. M. George
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Atomic Hydrogen ◽  
Differential Cross Sections ◽  
Proton Impact

scholarly journals Сечения образования ионов He-=SUP=-+-=/SUP=- в различных электронных состояниях при столкновениях ионов He-=SUP=-2+-=/SUP=- с атомами водорода

2020 ◽  
Vol 90 (6) ◽  
pp. 895
Author(s):  
А.А. Басалаев ◽  
В.В. Кузьмичев ◽  
М.Н. Панов ◽  
О.В. Смирнов
Keyword(s):  
Kinetic Energy ◽  
Electron Capture ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Precision Measurements ◽  
Capture Cross ◽  
Hydrogen Atoms ◽  
Hydrogen Target ◽  
Degree Of Dissociation ◽  
Capture Cross Sections

Using collision spectroscopy based on precision measurements of the kinetic energy of projectile ions that capture an electron, we measured the state selective electron capture cross sections of formation of He^+(n) ions at collision 3^He^{2 +} ions with an energy of E = 1.4-10 keV/a.m.u. with hydrogen atoms. The atomic hydrogen target with a degree of dissociation 78% at a temperature of tungsten dissociation cell 2180K has been made.

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