Dissociative charge transfer of He/sup +/ ions with H/sub 2/ and D/sub 2/ molecules from 78 to 330 K
The dissociative charge transfer of He/sup +/ ions with H/sub 2/ and D/sub 2/ molecules has been studied using a temperature-variable drift-tube mass-spectrometer apparatus over the temperature range 78 to 330 K. The binary rate coefficients are small at 300 K, approx.10/sup -13/--10/sup -14/ cm/sup 3//sec, and only slightly larger at 78 K. Termolecular contributions to the binary rate coefficients are found to be small at 330 K but increase substantially with decreasing temperature. Two-body charge transfer with D/sub 2/ is found to be slower than with H/sub 2/ by a factor of 10, in good agreement with recent theoretical predictions, although the measured values of the rate coefficients are larger by a factor of approx.4 than the predicted values.
- Research Organization:
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
- OSTI ID:
- 5613618
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 72:5; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC IONS
CHARGE EXCHANGE
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
COLLISIONS
CRYOGENIC FLUIDS
DEUTERIUM
DISSOCIATION
ELEMENTS
FLUIDS
HELIUM IONS
HYDROGEN
HYDROGEN ISOTOPES
ION COLLISIONS
ION-MOLECULE COLLISIONS
IONS
ISOTOPES
KINETICS
LIGHT NUCLEI
LOW TEMPERATURE
MASS SPECTROSCOPY
MEDIUM TEMPERATURE
MOLECULE COLLISIONS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
REACTION KINETICS
SPECTROSCOPY
STABLE ISOTOPES