Evidence for Rydberg doorway states in photoion pair formation in bromomethane.
The vacuum ultraviolet laser-excited photoion-pair formation spectrum of CH 3Br has been measured under high resolution in the threshold region. The (2 + 1) and (3 + 1) resonance-enhanced multiphoton ionization spectra in the same energy region are also reported. By comparison of the spectra in this and a more extended region, resonances in the photoion-pair formation spectrum are assigned to p and f Rydberg states. It is concluded that all the structure in the photoion-pair formation spectrum near threshold can be accounted for by members of the Omega = 0 subset of Rydberg states that act as doorway states to the ion channel.
Ridley
Trevor
T
School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, Scotland. T.Ridley@ed.ac.uk
Hennessy
John T
JT
Donovan
Robert J
RJ
Lawley
Kenneth P
KP
Wang
Shiliang
S
Brint
Paul
P
Lane
Eoin
E