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@ARTICLE{Szreder:863442,
author = {Szreder, T. and Schmidt, H. and Modolo, G.},
title = {{F}ast radiation-induced reactions in organic phase of
{SANEX} system containing {C}y{M}e4-{BTP}hen extracting
agent},
journal = {Radiation physics and chemistry},
volume = {164},
issn = {0969-806X},
address = {Frankfurt, M.},
publisher = {Pergamon Press},
reportid = {FZJ-2019-03507},
pages = {108356},
year = {2019},
abstract = {The mechanism of radiation-induced fast reactions occurring
in the early stages in the 1-octanol system containing
2,9-Bis-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo
(Herbst et al., 2011; Nash et al., 2015; Bourg et al.,
2015)triazin-3-yl)- (Herbst et al., 2011; Panak and Geist,
2013)phenanthroline (CyMe4-BTPhen) extracting agent were
studied. This is a simplified model of the r-SANEX organic
phase for the selective actinide(III)/lanthanide(III)
separation. Effects of various scavengers as well as water
content were under consideration. Radiation chemical yield
of e−s (G(e−s)) and their molar absorption coefficient
(ε(e−s)) in 1-octanol were found to be 130(10) nmol J−1
and 18500(700) M−1 cm−1, respectively. Rate constants of
e−s reactions with H+, O2, CyMe4-BTPhen and its protonated
form were found to be 1.5(3) × 109, 1.0(1) × 1010,
1.85(9) × 109, 1.9(6) × 109 M−1 s−1,
respectively. The C37 value for scavenging of dry electrons
(e−dry) by CyMe4-BTPhen was equal to 30.4(8) mM. Rate
constants of H• reactions with CyMe4-BTPhen and its
protonated form were found to be < 7.2 × 109 and
4.3(9) × 109 M−1 s−1, respectively. A
relatively good extraction performance of the system studied
under exposition to high radiation doses was explained on
the basis of hydroxyloctyl substitution in a phenanthroline
aromatic ring.},
cin = {IEK-6},
ddc = {530},
cid = {I:(DE-Juel1)IEK-6-20101013},
pnm = {161 - Nuclear Waste Management (POF3-161) / SACSESS -
Safety of ACtinide Separation proceSSes (323282)},
pid = {G:(DE-HGF)POF3-161 / G:(EU-Grant)323282},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000480377300016},
doi = {10.1016/j.radphyschem.2019.108356},
url = {https://juser.fz-juelich.de/record/863442},
}