New materials for ESR dosimetry
2002 (English)In: Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, ISSN 1386-1425, Vol. 58, no 6, 1301-1311 p.Article in journal (Refereed) Published
New materials for electron spin resonance (ESR) dosimetry have been investigated with the aim to find systems more sensitive than L-alanine accepted as a standard for high dose determinations. Among the investigated systems ammonium tartrate, 2-methylalanine, salts of formic acids and dithionates have been found to be more sensitive than alanine by a factor 2-10. The lower limit applies to tissue equivalent materials, while much higher sensitivities were obtained with formates and dithionates containing heavier atoms. The increased sensitivity was mainly attributed to suitable ESR properties of the room temperature stable radicals as regards spectral shape (narrow lines, little or no hyperfine structure) and microwave saturation properties (short relaxation times). The radical structures have when necessary been clarified by ENDOR spectroscopy, while the saturation properties have been screened by pulsed ESR measurements.
Place, publisher, year, edition, pages
2002. Vol. 58, no 6, 1301-1311 p.
ESR, dosimetry, new materials, tartrate, 2-methylalanine, formate, dithionate
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-26918DOI: 10.1016/S1386-1425(01)00719-3Local ID: 11542OAI: oai:DiVA.org:liu-26918DiVA: diva2:247468