Enhanced sensitivity of lithium dithionates doped with rhodium and nickel for EPR dosimetry
2005 (English)In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, ISSN 1386-1425, Vol. 62, no 1-3, 614-620 p.Article in journal (Refereed) Published
Electron paramagnetic resonance (EPR) studies of X-irradiated lithium dithionate, Li2S2O6·2H2O, doped with Ni and Rh have shown that these impurities enhance the yield of radicals formed by X-irradiation at room temperature. The signal in the doped samples, measured peak-to-peak of the single EPR derivative line attributed to the SO3− anion was about 3–4 times that of the pure lithium dithionate and more than 10 times stronger than the alanine signal. These impurities also shortened the spin-lattice relaxation time, T1, which gives the possibility to measure the doped samples at a higher microwave power. This implies that sensitivity could be further enhanced in the already sensitive EPR dosimeter material lithium dithionate.
Place, publisher, year, edition, pages
2005. Vol. 62, no 1-3, 614-620 p.
EPR dosimetry; Free radicals; Radiation; Radiation yield; Spin-lattice relaxation; Effect of dopants
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-12961DOI: 10.1016/j.saa.2005.01.024OAI: oai:DiVA.org:liu-12961DiVA: diva2:17545