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Issue J. Phys. Colloques
Volume 47, Number C2, Mars 1986
32 nd International Field Emission Symposium / 32ème Symposium International d'Emission de Champ
Page(s) C2-151 - C2-155
DOI http://dx.doi.org/10.1051/jphyscol:1986222

32 nd International Field Emission Symposium / 32ème Symposium International d'Emission de Champ

J. Phys. Colloques 47 (1986) C2-151-C2-155
DOI: 10.1051/jphyscol:1986222

A STUDY OF ULTRA-FAST ION REACTIONS WITH FEMTOSECOND TIME RESOLUTION : FIELD DISSOCIATION OF METAL HELIDE IONS BY ATOMIC TUNNELING

T.T. TSONG

Physics Department, The Pennsylvania State University, University Park, PA 16802, U.S.A.


Abstract
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.