1 research outputs found
Dominant Stable Radicals in Irradiated Sucrose: <b>g</b> Tensors and Contribution to the Powder Electron Paramagnetic Resonance Spectrum
Ionizing radiation
induces a composite, multiline electron paramagnetic
resonance (EPR) spectrum in sucrose, that is stable at room temperature
and whose intensity is indicative of the radiation dose. Recently,
the three radicals which dominate this spectrum were identified and
their proton hyperfine tensors were accurately determined. Understanding
the powder EPR spectrum of irradiated sucrose, however, also requires
an accurate knowledge of the <b>g</b> tensors of these radicals.
We extracted these tensors from angular dependent electron nuclear
double resonance-induced EPR measurements at 110 K and 34 GHz. Powder
spectrum simulations using this completed set of spin Hamiltonian
parameters are in good agreement with experimentally recorded spectra
in a wide temperature and frequency range. However, as-yet nonidentified
radicals also contribute to the EPR spectra of irradiated sucrose
in a non-negligible way