J. Phys. Colloques 47 (1986) C2-151-C2-155
A STUDY OF ULTRA-FAST ION REACTIONS WITH FEMTOSECOND TIME RESOLUTION : FIELD DISSOCIATION OF METAL HELIDE IONS BY ATOMIC TUNNELINGT.T. TSONG
Physics Department, The Pennsylvania State University, University Park, PA 16802, U.S.A.
An ion reaction time amplification scheme for the time-of-flight spectrometer is proposed. With this scheme ion reactions can be studied with a time resolution as good as 10-14 sec. We have studied field dissociation by atomic tunneling of metal helide ions such as RhHe2+ using this scheme. Field dissociation of RhHe2+ can occur by atomic tunneling within a few 10-13 sec in a field of ~4.8 V/Å.