Improvement of sensitivity in the alanine/ESR dosimetry

Improvement of sensitivity in the alanine/ESR dosimetry is presented by considering spin-lattice and spin-spin relaxation rates of the room temperature radical in irradiated polycrystalline l-alanine. Both relaxation rates exhibit anomalous decrease due to hindered rotation of the methyl group. It i...

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Bibliographic Details
Published inApplied radiation and isotopes Vol. 47; no. 5; pp. 525 - 528
Main Author Rakvin, B.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.1996
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Summary:Improvement of sensitivity in the alanine/ESR dosimetry is presented by considering spin-lattice and spin-spin relaxation rates of the room temperature radical in irradiated polycrystalline l-alanine. Both relaxation rates exhibit anomalous decrease due to hindered rotation of the methyl group. It is demonstrated that this effect can improve a signal: noise ratio of the spectrum for 30% by detecting the ESR signal at around 200 K compared to the room temperature detection. The application of improvement can be expected in the therapy-level dose range where the intensity of detected signal is comparable to a nonlinear background signal.
ISSN:0969-8043
1872-9800
DOI:10.1016/0969-8043(96)00004-8