Reactions of He/sup +/, Ne/sup +/, and Ar/sup +/ with CH/sub 4/, C/sub 2/H/sub 6/, SiH/sub 4/, and Si/sub 2/H/sub 6/
The rate coefficients and product-ion distributions for the reactions of He/sup +/ and Ar/sup +/ with silane and disilane have been measured in a drift tube, typically for collision energies of 0.01--1 eV. The total charge-exchange rate coefficients are found to be roughly independent of E/N, or collision energy, and are about equal to the Langevin values for the reactions of He/sup +/ with SiH/sub 4/ and C/sub 2/H/sub 6/ and Ar/sup +/ with CH/sub 4/ and C/sub 2/H/sub 6/. The He/sup +/ rate coefficients on CH/sub 4/ and Si/sub 2/H/sub 6/, and the Ne/sup +/ rate coefficients on SiH/sub 4/ and Si/sub 2/H/sub 6/ are 50% to 80% of the Langevin values, while the Ar/sup +/ rate coefficients on SiH/sub 4/ and Si/sub 2/H/sub 6/ are much smaller. Product ions tend to be hydrogen poor with very infrequent breaking of the C--C or Si--Si bonds. Furthermore, hydrogen stripping is more severe for the silanes than the alkanes. These product-ion distributions bear no resemblance to the product-ion distributions of either photoionization or electron collisional ionization.
- Research Organization:
- Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309
- OSTI ID:
- 5909833
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 79:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARGON IONS
ION-MOLECULE COLLISIONS
ETHANE
HELIUM IONS
METHANE
NEON IONS
SILANES
CHARGE EXCHANGE
CHEMICAL REACTION KINETICS
ALKANES
CHARGED PARTICLES
COLLISIONS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
ION COLLISIONS
IONS
KINETICS
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
REACTION KINETICS
SILICON COMPOUNDS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena