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Rare gas sensitized radiolysis of hydrogen sulfide in the low concentration range. [. gamma. radiation; reaction kinetics; yields]

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100551a002· OSTI ID:7265575
; ;
Hydrogen and sulfur yields have been determined in the rare gas sensitized radiolysis of hydrogen sulfide. A decrease in G(H/sub 2/) and G(S) has been discovered in each of the three mixtures examined: H/sub 2/S--Ar, H/sub 2/S--Kr, and H/sub 2/S--Xe. A mechanism has been proposed including (1) competition between a charge transfer to H/sub 2/S and Ar/sub 2//sup +/ formation in the H/sub 2/S--Ar system, and (2) competition between an excitation transfer to H/sub 2/S and formation of excited rare gas molecules in H/sub 2/S--Xe and H/sub 2/S--Kr mixtures. Rate constants of the charge and excitation transfer have been estimated: k/sub Ar/sup +/ + H/sub 2/S/ = 1.8 x 10/sup -9/ cm/sup 3/ s/sup -1/, k/sub Kr* + H/sub 2/S/ = (0.6-1.5) x 10/sup -9/ cm/sup 3/ s/sup -1/, and k/sub Xe* + H/sub 2/S/ = 2.7 x 10/sup -9/ cm/sup 3/ s/sup -1/. The relevance of Franck--Condon transitions in the charge-transfer processes has been shown. The maximum recombination energy values of the rare gas molecular ions were estimated as 14.0, 12.7, and 10.8 eV for Ar/sub 2//sup +/, Kr/sub 2//sup +/, and Xe/sub 2//sup +/, respectively.
Research Organization:
University Teachers Coll., Siedlce, Poland
OSTI ID:
7265575
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 80:10; ISSN JPCHA
Country of Publication:
United States
Language:
English

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Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ARGON
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
G VALUE
GAMMA RADIATION
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IONIZING RADIATIONS
KINETICS
KRYPTON
NONMETALS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
RARE GASES
REACTION KINETICS
SULFIDES
SULFUR
SULFUR COMPOUNDS
XENON
YIELDS