Study of dissociative electronic states of the hydrogen halide molecules and molecular ions yielding H/sup +/ through time-of-flight spectroscopy

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5548016

Kittams, B B

Results are described of time-of-flight spectroscopic examination of H/sup +/ ions resulting from electron bombardment of the hydrogen halide molecules HF, HCl, HBr, and HI. The time-of-flight spectra of the H/sup +/ fragments and their corresponding H/sup +/ fragment kinetic energy spectra are used to study the dissociative processes that yield H/sup +/ fragments for electron bombardment energies in the 15 eV to 51 eV range. The H/sup +/ fragments are produced in an interaction region defined by a pulsed electron beam colliding with the target gas. By keeping the gas pressure sufficiently low to guarantee that the fragment path length to the ion detector is much less than the mean-free path length in the gas, the fragments' velocities can be considered a sample of fragment velocities produced by the electron beam and hydrogen halide gas in the interaction region. The geometry of the interaction region primarily detected fragments produced at 90/sup 0/ to the electron beam axis. The electron gun used was designed to allow computer control of the electron bombardment energy. The computer also controlled a programmable multichannel analyzer that allowed the data to be acquired in a fashion that permitted normalization of the H/sup +/ TOF spectra taken at different electron bombardment energies.

• Research Organization: Arizona Univ., Tucson (USA)
• OSTI ID: 5548016
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
HALOGEN COMPOUNDS
HYDRIODIC ACID
HYDROBROMIC ACID
HYDROCHLORIC ACID
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INORGANIC ACIDS
IODINE COMPOUNDS
IONS
MOLECULAR IONS
PRODUCTION