Three-Coulomb-wave Pluvinage model for Compton double ionization of helium in the region of the cross-section maximum

2005 ◽  
Vol 72 (1) ◽  
Author(s):  
S. Jones ◽  
Joseph H. Macek ◽  
D. H. Madison
Keyword(s):  
Cross Section ◽  
Double Ionization ◽  
The Cross ◽  
Cross Section Maximum

Compton Double Ionization of Helium in the Region of the Cross-Section Maximum

1999 ◽  
Vol 83 (1) ◽  
pp. 53-56 ◽  
Author(s):  
B. Krässig ◽  
R. W. Dunford ◽  
D. S. Gemmell ◽  
S. Hasegawa ◽  
E. P. Kanter ◽  
...  
Keyword(s):  
Cross Section ◽  
Double Ionization ◽  
The Cross ◽  
Cross Section Maximum

scholarly journals Deuteron breakup at zero angle in the Coulomb nuclear field

2019 ◽  
Vol 204 ◽  
pp. 10011
Author(s):  
Igor Sitnik
Keyword(s):  
Cross Section ◽  
High Precision ◽  
Cross Sections ◽  
High Energy Physics ◽  
Nuclear Research ◽  
High Energy ◽  
Deuteron Breakup ◽  
The Cross ◽  
Cross Section Maximum ◽  
Energy Physics

Deuteron breakup cross sections on the C and CH2 targets have been measured up to the proton internal momenta of 0.3 GeV/c. The cross-sections 12C(d, p)X and 1H(d, p)X reactions have been obtained with high precision. The obtained data are compared with previous measurements. The behavior features in the vicinity of the cross section maximum were studied in dependence on the transversal momentum in the region of 0.01 < pt < 0.16 GeV/c. The measurements have been performed at the Veksler Baldin Laboratory of High Energy Physics of the Joint Institute for Nuclear Research.

Excitation de l'argon par impact électronique entre 43 et 60 eV

1975 ◽  
Vol 53 (21) ◽  
pp. 2438-2444 ◽  
Author(s):  
P. Marmet ◽  
E. Bolduc ◽  
J. J. Quémener
Keyword(s):  
Electron Impact ◽  
Cross Section ◽  
Ground State ◽  
Quadratic Function ◽  
Double Ionization ◽  
The Cross ◽  
Ionic States

This work reports numerous atomic levels of Ar observed between 43.38 and 60 eV above the ground state of Ar I. These levels, until now undetected, produce weak perturbations on the double ionization curve obtained by electron impact. The cross section near this Ar++ threshold varies very nearly as a quadratic function. Most of the reported levels of argon have the configuration 3s3p54l 4l′. Ionic states are also responsible for some of these structures.

A measurement of the ionization cross-section of helium ions by electron impact

1961 ◽  
Vol 264 (1318) ◽  
pp. 367-378 ◽  
Keyword(s):  
Electron Impact ◽  
Cross Section ◽  
Born Approximation ◽  
Atomic Hydrogen ◽  
Ionization Cross Section ◽  
Helium Ions ◽  
Ionization Cross ◽  
The Cross ◽  
Cross Section Maximum

An apparatus, based on the crossed-beam principle, is described for measuring the ionization cross-section of ions by electron impact. The cross-section for the reaction He + + e → He 2+ + 2 e is determined from the threshold at 54.4 to 1000 eV. The results are compared with the ionization cross-section of atomic hydrogen and with theory. The He + cross-section, when scaled by the appropriate factor, is very similar to that of atomic hydrogen but increases more rapidly in the neighbourhood of the threshold. At the highest electron energies the cross-section agrees well with that predicted by the Coulomb-Born approximation but is considerably lower at the cross-section maximum. For electron energies above 150 eV the error in the measurement is estimated to be less than ± 10% .

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Energy Distribution in Electron Beams

1972 ◽  
Vol 30 ◽  
pp. 568-569
Author(s):  
Tamotsu Ohno
Keyword(s):  
Electron Beam ◽  
Energy Distribution ◽  
Cross Section ◽  
Integral Curve ◽  
Electron Beams ◽  
Electron Gun ◽  
Angular Divergence ◽  
Apparent Increase ◽  
Integral Width ◽  
The Cross

The energy distribution in an electron; beam from an electron gun provided with a biased Wehnelt cylinder was measured by a retarding potential analyser. All the measurements were carried out with a beam of small angular divergence (<3xl0-4 rad) to eliminate the apparent increase of energy width as pointed out by Ichinokawa.The cross section of the beam from a gun with a tungsten hairpin cathode varies as shown in Fig.1a with the bias voltage Vg. The central part of the beam was analysed. An example of the integral curve as well as the energy spectrum is shown in Fig.2. The integral width of the spectrum ΔEi varies with Vg as shown in Fig.1b The width ΔEi is smaller than the Maxwellian width near the cut-off. As |Vg| is decreased, ΔEi increases beyond the Maxwellian width, reaches a maximum and then decreases. Note that the cross section of the beam enlarges with decreasing |Vg|.

Research in the cross-section of community psychology and global climate change: A call for action

2009 ◽  
Author(s):  
Marci Culley ◽  
Holly Angelique ◽  
Courte Voorhees ◽  
Brian John Bishop ◽  
Peta Louise Dzidic ◽  
...  
Keyword(s):  
Climate Change ◽  
Cross Section ◽  
Global Climate Change ◽  
Community Psychology ◽  
Global Climate ◽  
The Cross
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