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Full-Text Articles in Physical Sciences and Mathematics
X-Ray Emission Cross Sections Following Charge Exchange By Multiply Charged Ions Of Astrophysical Interest, Sebastian Otranto, Ronald E. Olson, P. Beiersdorfer
X-Ray Emission Cross Sections Following Charge Exchange By Multiply Charged Ions Of Astrophysical Interest, Sebastian Otranto, Ronald E. Olson, P. Beiersdorfer
Physics Faculty Research & Creative Works
State selective nl-electron capture cross sections are presented for highly charged ions with Z=6-10 colliding with atoms and molecules. The energy range investigated was from 1 eV/amu(v=0.006 a.u.)to 100 keV/amu(v=2.0 a.u.). The energy dependence of the l-level populations is investigated. The K shell x-ray emission cross sections are determined by using the calculated state-selective electron capture results as input and then applying hydrogenic branching and cascading values for the photon emission. A major shift in the line emission from being almost solely Lyman-alpha transitions at the highest collisions energies to strong high-n to 1s transitions at the lowest energies is …
Initial-State Correlation Effects In Low-Energy Proton Impact Ionization, M. Foster, Jerry Peacher, Ahmad Hasan, Michael Schulz, Don H. Madison
Initial-State Correlation Effects In Low-Energy Proton Impact Ionization, M. Foster, Jerry Peacher, Ahmad Hasan, Michael Schulz, Don H. Madison
Physics Faculty Research & Creative Works
In this paper, we will report on fully differential cross sections (FDCS) for single ionization of helium by 75 keV proton impact for fixed ejected electron energies and different momentum transfers. These measurements show major discrepancies in the absolute magnitude between experiment and the theoretical, 3DW (three-distorted-wave) model. The 3DW model treats the collision as a three-body process (projectile, ion, ejected electron), and for the scattering plane it has accurately predicted the FDCS for higher energy C6+ impact ionization of helium. The lack of agreement between the 3DW model and experiment for low energy collisions suggests that a three-body …