Abstract
Collision energy dependence of the Penning ionization cross-section for the Kr( 3P) + (CH 3) 3CBr → Kr + (CH 3) 3CBr + + e − reaction was determined under orientation-angle resolved condition using an oriented (CH 3) 3CBr beam and time-of-flight measurements. A remarkable resonance-type structure was found in the energy dependence of orientation-angle resolved Penning ionization cross-section. This resonance-type structure could be interpreted as a new-type ‘nuclear-excited Feshbach resonance’ in the formation of vibrational excited Rydberg states leading to a competitive dissociative exit channel.
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