Chemistry of nuclear recoil /sup 18/F atoms. X. Studies of /sup 18/F caged capture processes in CH/sub 3/CF/sub 3//H/sub 2/S and CH/sub 3/CHF/sub 2//H/sub 2/S liquid mixtures
Journal Article
·
· J. Phys. Chem.; (United States)
Absolute nuclear recoil /sup 18/F yields have been determined for liquid-phase fluoroethane/H/sub 2/S mixtures at H/sub 2/S concentrations ranging to 50 mol %. The results have been interpreted using contrasting Miller-Dodson and steady-state nonthermal kinetic formulations. The Miller-Dodson collision densities do not change significantly with the addition of H/sub 2/S. Nonthermal rate coefficients are closely comparable and independent of mixture composition for F-to-HF reactions with H/sub 2/S, CH/sub 3/CF/sub 3/, and CH/sub 3/CHF/sub 2/, exceeding by roughly fivefold the composite values that include all fluoroethane organic reaction channels. Branching ratios for /sup 18/F energetic bimolecular vs. caging reactions are independent of H/sub 2/S concentration. In contrast with the predictions of collision-theory cage-effect models, efficient F-to-HF reactions do not interfere with primary caged capture. Reaction probability functions for energetic F-to-HF processes in H/sub 2/S and fluoroethanes are crudely similar and extend to center-of-mass energies of 25 eV or more.
- Research Organization:
- Univ. of California, Davis
- OSTI ID:
- 5342762
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 81:25; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Tue Mar 02 23:00:00 EST 1976
· J. Am. Chem. Soc.; (United States)
·
OSTI ID:7353049
Infrared chemiluminescence and laser-induced fluorescence studies of energy disposal by reactions of F and Cl atoms with H/sub 2/S (D/sub 2/S), H/sub 2/Se, H/sub 2/O (D/sub 2/O), and CH/sub 3/OH
Journal Article
·
Thu May 22 00:00:00 EDT 1986
· J. Phys. Chem.; (United States)
·
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· J. Phys. Chem.; (United States)
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHALCOGENIDES
CHEMISTRY
DISPERSIONS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE 18
FLUORINE ISOTOPES
HALOGENATED ALIPHATIC HYDROCARBONS
HOT ATOM CHEMISTRY
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
ISOTOPES
LIGHT NUCLEI
LIQUIDS
MIXTURES
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIOCHEMISTRY
RADIOISOTOPES
RECOILS
SULFIDES
SULFUR COMPOUNDS
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHALCOGENIDES
CHEMISTRY
DISPERSIONS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE 18
FLUORINE ISOTOPES
HALOGENATED ALIPHATIC HYDROCARBONS
HOT ATOM CHEMISTRY
HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
ISOTOPES
LIGHT NUCLEI
LIQUIDS
MIXTURES
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIOCHEMISTRY
RADIOISOTOPES
RECOILS
SULFIDES
SULFUR COMPOUNDS