Diffusion-kinetic theories for LET effects on the radiolysis of water

Journal Article · Thu Jun 16 04:00:00 EDT 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100075a016· OSTI ID:7242818

Pimblott, S M; LaVerne, J A ^[1]

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1. Univ. of Notre Dame, IN (United States)

Diffusion-kinetic methods are used to investigate the effects of incident particle linear energy transfer (LET) on the radiolysis of water and aqueous solutions. Chemically realistic deterministic diffusion-kinetic calculations examining the scavenging capacity dependences of the scavenged yield of e[sub aq][sup [minus]] and of OH demonstrate that the scavenged yields are related to the underlying time-dependent kinetics in the absence of the scavenger by a simple Laplace transform relationship. This relationship is also shown to link the effect of an e[sub eq][sup [minus]] scavenger on the formation of H[sub 2] with the time dependence of H[sub 2] production in the absence of the scavenger. The simple Laplace relationship does not work well when applied to H[sub 2]O[sub 2] formation in high-LET particle tracks even though such a relationship is valid with low-LET particles. It is found that while the secondary reaction of H[sub 2]O[sub 2] with e[sub aq][sup [minus]] can be neglected in low-LET particle radiolysis, it is of considerable significance in the tracks produced by high-LET particles. The increased importance of this reaction with increasing LET is the major reason for the failure of the Laplace relationship for H[sub 2]O[sub 2]. 55 refs., 9 figs., 2 tabs.

• OSTI ID: 7242818
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:24; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400600* -- Radiation Chemistry
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
AQUEOUS SOLUTIONS
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COMPILED DATA
DATA
DECOMPOSITION
DIFFUSION
DISPERSIONS
ELECTRON BEAMS
ELEMENTS
ENERGY TRANSFER
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INFORMATION
INTEGRAL TRANSFORMATIONS
LAPLACE TRANSFORMATION
LEPTON BEAMS
MATHEMATICAL MODELS
MIXTURES
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PARTICLE BEAMS
PEROXIDES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
SCAVENGING
SOLUTIONS
TRANSFORMATIONS
WATER