Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Angular And Energy Distributions Of Electrons From 7.5- 150-Kev Proton Collisions With Oxygen And Carbon Dioxide, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
Angular And Energy Distributions Of Electrons From 7.5- 150-Kev Proton Collisions With Oxygen And Carbon Dioxide, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
M. Eugene Rudd Publications
Cross sections for the ejection of electrons, differential in the angle and energy of emission, were measured for proton collisions with two molecular gases, oxygen and carbon dioxide, over the primary energy range of 7.5-150 keV and an angular range of 10° to 160°. The energy distributions, obtained by integration over the angle, were fitted by an analytical model. A discrepancy in the angular distributions compared to those of Gibson and Reid [J. Phys. E 17, 1227 (1984); J. Phys. B 19, 3265 (1986); Radiat. Res. 112, 418 (1987); Australian Atomic Energy Commission Report No. AAEC/E659, 1987 (unpublished)] is discussed. …
Differential Cross Sections For Ejection Of Electrons From Rare Gases By 7.5- 150-Kev Protons, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
Differential Cross Sections For Ejection Of Electrons From Rare Gases By 7.5- 150-Kev Protons, Wen-Qin Cheng, M. Eugene Rudd, Ying-Yuan Hsu
M. Eugene Rudd Publications
Absolute cross sections for the ejection of electrons by ;proton impact that are differential in the angle and energy of the electrons have been measured for :helium, neon, and krypton. The primary energy ranged from 7.5 to 150 keV, the angles from 10° to 160°, and the measured energies from 1 to 550 eV. These data along with earlier data on argon are used to study the systematics of proton impact ionization of the rare gases. An analytical model is employed to correlate and systematize the cross-section differential in ejected-electron energy. For low-energy collisions the angular distribution of electrons ejected …
User-Friendly Model For The Energy Distribution Of Electrons From Proton Or Electron Collisions, M. Eugene Rudd
User-Friendly Model For The Energy Distribution Of Electrons From Proton Or Electron Collisions, M. Eugene Rudd
M. Eugene Rudd Publications
A model is presented which gives cross sections (differential in the ejected secondary electron energy) for the ionization of atoms and molecules in proton or electron collisions. The model is in the form of an analytical equation which holds for all primary and secondary energies and for any target gas for which certain parameters are known. The accuracy is estimated to be 15-20%. The model is based on the classical binary encounter model modified to agree with the Bethe theory at high energies and, for proton impact, with the molecular promotion model at low energies. For multi-shell targets, the partial …