Observation of l-dependent rate constants for ion production in Rydberg electron transfer reactions
Relative rate constants for negative ion production have been measured for the Rydberg electron transfer reactions Cs**(ns,np,nd) +SF/sub 6/..-->..Cs/sup +/+SF/sup -//sub 6/ and Cs**(ns,np,nd) +CCl/sub 4/..-->..Cs/sup +/+Cl/sup -/+CCl/sub 3/. We find that rate constant for production of Cl/sup -/ from CCl/sub 4/ are dependent upon the angular momentum of the Rydberg electron, with k/sub n//sub d/>k/sub n//sub s/ for values of n as large as 40. Preliminary measurements for potassium (ns,nd) Rydberg atoms show that the l dependence for K is much smaller than that for Cs. These results are inconsistent with the ''free electron model'' used to describe these reactions. It is suggested that the observed l dependence is related to postattachment interactions with the Rydberg atom core which affect the survival of the Cl/sup -/ ions.
- Research Organization:
- Chemical Physics Section, Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6125
- OSTI ID:
- 6549703
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 90:5; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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400201* -- Chemical & Physicochemical Properties
ALKALI METALS
ANGULAR MOMENTUM
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON TETRACHLORIDE
CESIUM
CHARGE EXCHANGE
CHEMICAL REACTION KINETICS
CHLORINATED ALIPHATIC HYDROCARBONS
COLLISIONS
ELECTRON TRANSFER
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
IONIZATION
KINETICS
METALS
MOLECULE COLLISIONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
REACTION KINETICS
RYDBERG STATES
SULFUR COMPOUNDS
SULFUR FLUORIDES