Time-of-flight study of H(2S) and D(2S) produced by electron impact on H/sub 2/, D/sub 2/, and HD: Evidence for predissociation

Journal Article · Fri Jun 01 04:00:00 EDT 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.19.2192· OSTI ID:5988708

Ryan, S R; Spezeski, J J; Kalman, O F; Lamb, Jr, W E; McIntyre, Jr, L C; Wing, W H

Time-of-flight spectra of H(2S) and D(2S) fragments from electron-bombardment-dissociated H/sub 2/, D/sub 2/, and HD have been observed. Structure in the kinetic-energy distributions below 1.3 eV is interpreted as arising from predissociation of bound vibrational levels. For H/sub 2/ and D/sub 2/ the primary predissociation process appears to be predissociation of the D state via the B' state. Predissociation structure for HD, although more prominent than for H/sub 2/ and D/sub 2/, is not as easily interpreted. Evidence for the direct dissociation of the B' state has also been obtained and the relative probabilities of direct dissociation and predissociation have been estimated.

• Research Organization: Department of Physics, University of Arizona, Tucson, Arizona 85721
• OSTI ID: 5988708
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 19:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CRYOGENIC FLUIDS
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
DISSOCIATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
FLUIDS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MOLECULE COLLISIONS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PREDISSOCIATION
STABLE ISOTOPES
TIME-OF-FLIGHT METHOD