Speaker
Dr
Wladek Kedzierski
(University of Windsor)
Description
Metastable particles produced in the interaction of electrons of carefully controlled energy with thermal gaseous target beams in a crossed beam set-up have been studied in the energy range from threshold to 300 eV. The e-beam is pulsed and the metastables produced drift to a solid nitrogen detector held at 10 K. Here they transfer their energy to states which radiate. The resultant photons are detected using a photomultiplier-filter combination. Time-of-flight techniques are used to separate these photons from prompt photons produced in the initial electron collision. With N2 as both target and detection matrix, the emission is strongest in the green but still significant in the red spectral region. Excitation functions will be presented together with threshold measurements. These help to identify the metastable states being observed and the excitation mechanisms which are responsible.
The authors thank NSERC and CFI, (Canada), for financial support.
Authors
Dr
William McConkey
(University of Windsor)
Dr
Wladek Kedzierski
(University of Windsor)
Co-author
Ms
Fatimah Alsaiari
(University of Windsor)
