Resonant Electron Transfer and K-Shell Excitation of Fq+ (Q=6,8) in Collisions with Neutral He and H2 Targets
Date of Award
Master of Arts
Dr. John A. Tanis
Dr. Eugene M. Bernstein
Dr. Steven M. Ferguson
Masters Thesis-Open Access
Measurements of resonant transfer and excitation (RTE) were conducted for 16.5-38 MeV F6+ (Li-like) ions colliding with H2. In the RTE process electron capture and projectile excitation take place simultaneously due to the electronelectron interaction. In previous work, for the same collision system, at the Oak Ridge National Laboratory (Oak Ridge, TN) , the magnitude of the measured RTE cross sections was found to be nearly a factor of two smaller than theory. In order to investigate RTE in F6+ H2 collisions more completely, we undertook measurements at Western Michigan University using the EN tandem Van de Graaff accelerator, and, additionally, related measurements were made for Fq+ + H2 and Fq+ + He collision systems with q=8 and 9. The present RTE cross sections for F6+ + H2 are about 70% larger than those obtained at Oak Ridge and show good agreement with theoretical predictions.
Zaharakis, Konstantinos E., "Resonant Electron Transfer and K-Shell Excitation of Fq+ (Q=6,8) in Collisions with Neutral He and H2 Targets" (1991). Masters Theses. 1003.