Speaker
Collin Tiessen
(U)
Description
A crossed electron-gas beam system coupled to a VUV spectrometer has been used to investigate the dissociation of thymine (C5H6N2O2) into excited atomic fragments in the electron-impact energy range from threshold to 375 eV. A special stainless steel oven is used to vaporize the thymine and form it into a beam where it is intersected by a magnetically collimated electron beam, typical current 50 µA. The main features in the spectrum are the H Lyman series lines. The probability of extracting excited C or N atoms from the ring is shown to be very small. In addition to spectral data, excitation probability curves as a function of electron energy will be presented for the main emission features. Possible dissociation channels and excitation mechanisms in the parent molecule will be discussed.
The authors thank NSERC (Canada) for financial support.
Author
Collin Tiessen
(U)
Co-authors
Dr
J W McConkey
(University of Windsor)
Dr
Jeff Hein
(Jet Propulsion Laboratory, California Institute of Technology)
Mr
Joshuah Trocchi
(University of Windsor)
Dr
W Kedzierski
(University of Windsor)
