Download or read book Differential Cross Sections of Positron hydrogen Collisions Project Supported by the Nanyang Normal University Science Foundation of China Grant No ZX2013017 and the National Natural Science Foundation of China Grant Nos 11174066 61306007 and U1304114 written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We make a detailed study on the angular differential cross sections of positron–hydrogen collisions by using the momentum-space coupled-channels optical (CCO) method for incident energies below the H ionization threshold. The target continuum and the positronium (Ps) formation channels are included in the coupled-channels calculations via a complex equivalent-local optical potential. The critical points, which show minima in the differential cross sections, as a function of the scattering angle and the incident energy are investigated. The resonances in the angular differential cross sections are reported for the first time in this energy range. The effects of the target continuum and the Ps formation channels on the different cross sections are discussed.

Download or read book Differential Cross Sections for Electron Impact Excitation of Molecular Hydrogen Using the Momentum space Multichannel Optical Method Project Supported by the National Natural Science Foundation of China Grant Nos 11447158 and 11404223 written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In the present work, the momentum-space multichannel optical method is employed in four-state close-coupling calculations to study the electronic excitation of H2 molecules by electron-impact. Particularly, differential cross sections for the, , and transitions are reported. Comparison is made with the available experimental and theoretical results.