Abstract

The results of a comprehensive study of projectile excitation and ionization cross sections for fast lithium atoms and positive ions impacting on low-$Z$ (\ensuremath{\le}11) targets are presented. This theoretical study is based on an asymptotic (high-speed) form of the Born approximation and the emphasis is placed on establishing the principal collision processes for ${\mathrm{Li}}^{0}$ at high energies, including inner-shell and valence-shell transitions to both discrete and continuum final states. An extensive comparison with experimental results for ${\mathrm{H}}_{2}$, He, and N targets is included. Recent experimental data for the ${\mathrm{Li}}^{0}$ $2P\ensuremath{-}2S$ emission cross sections for He targets in the 10---100-keV/u energy regime are in good agreement with the theoretical results, although significant departures from the trend of those data are predicted for higher energies due to the onset of doubly inelastic processes. Some discrepancies with recently reported ${\mathrm{Li}}^{0}$ electron-loss cross sections at $\frac{6}{7}$ MeV/u are noted for several targets.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.