Resonant Electron Transfer and K-Shell Excitation of F^q+ (Q=6,8) in Collisions with Neutral He and H² Targets

Author

Konstantinos E. Zaharakis, Western Michigan University

Date of Award

6-1991

Degree Name

Master of Arts

Department

Physics

First Advisor

Dr. John A. Tanis

Second Advisor

Dr. Eugene M. Bernstein

Third Advisor

Dr. Steven M. Ferguson

Access Setting

Masters Thesis-Open Access

Abstract

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 F^q+ + H₂ and F^q+ + 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.

Recommended Citation

Zaharakis, Konstantinos E., "Resonant Electron Transfer and K-Shell Excitation of F^q+ (Q=6,8) in Collisions with Neutral He and H² Targets" (1991). Masters Theses. 1003.
https://scholarworks.wmich.edu/masters_theses/1003