L. Wojnarovits et Ja. Laverne, IODINE AS A RADICAL SCAVENGER IN THE RADIOLYSIS OF CYCLOPENTANE, Radiation physics and chemistry, 47(3), 1996, pp. 361-363
Citations number
10
Categorie Soggetti
Nuclear Sciences & Tecnology","Chemistry Physical","Physics, Atomic, Molecular & Chemical
Scavenging techniques with iodine in the concentration range of 0.1 to
30 mM were used to elucidate the radical yields in the gamma-radiolys
is of cyclopentane. In solutions below about 1 mM iodine reacts solely
with alkyl radicals in the bulk of the medium. However, above this co
ncentration the scavenging of thermal hydrogen atoms becomes significa
nt and virtually all of the hydrogen atoms are scavenged at an iodine
concentration of 30 mM. High concentrations of iodine are also found t
o reduce the cyclopentene yield, probably by reaction with ionic speci
es produced as intermediates in cyclopentane radiolysis. At low iodine
concentrations the yield of the main scavenging product, cyclopentyl
iodide, and thereby the yield of the scavenged cyclopentyl radicals th
at escape the spur into the bulk medium was found to be 4.0 radicals/1
00 eV. The total cyclopentyl radical yield derived from the observed k
(d)/k(c) ratio and the bicyclopentyl yield is estimated to be 4.9 radi
cals/100 eV.