Pulse radiolysis of hydrocarbon glasses at 6 and 77 K. [35-MeV electrons]
Several hydrocarbon glasses have been studied by pulse radiolysis at 6 and 77K. The ratio of the initial yield of trapped electrons, G(e/sub t//sup -/), at 6K to the initial yield at 77K was found to be 0.81 for 3-methylpentane (3MP), 0.97 for 2-methylpentane (2MP), 0.80 for 3-methylhexane, 0.93 for methylcyclohexane (MCH/sub x/), 1.0 for 3-methyloctane (3MO), and 1.0 for 2,4-dimethylpentane. These results, together with the smaller ratios measured at long times for 3MP, 2MP, and MCH/sub x/, lead us to conclude that more decay of e/sub t//sup -/ between 100 ns and minutes takes place at 6 than at 77K. Slower trap deepening at 6K compared to 77K, which would lead to more electron tunneling at 6 than 77K, could account for the results. The initial spectra of e/sub t//sup -/ at 6K are red-shifted compared to 77K for 3MP and 2MP; the other hydrocarbons have the same maxima at both temperatures. The positive ion of 3MO is considerably more stable in the glass than in the liquid phase at 127K.
- Research Organization:
- National Research Council of Canada, Ottawa
- OSTI ID:
- 6340908
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 83:3
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spectra, yields, and photolability of cations, carbanions, radicals, and scavenger anions in. gamma. -irradiated alkane glasses
Influence of molecular structure and temperature on trapped electron yields in. gamma. -irradiated hydrocarbon glasses. Trapped electron decay in 2,4-dimethylpentane at < or =22 K
Related Subjects
ALKANES
RADIOLYSIS
CYCLOALKANES
TRAPPED ELECTRONS
G VALUE
ELECTRON BEAMS
EXPERIMENTAL DATA
GLASS
ISOLATED VALUES
LOW TEMPERATURE
MEV RANGE 10-100
PULSED IRRADIATION
ULTRALOW TEMPERATURE
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DATA FORMS
DECOMPOSITION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HYDROCARBONS
INFORMATION
IRRADIATION
LEPTON BEAMS
LEPTONS
MEV RANGE
NUMERICAL DATA
ORGANIC COMPOUNDS
PARTICLE BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
400600* - Radiation Chemistry