liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
An ESR and ENDOR study of irradiated 6Li-formate
Linköping University, Faculty of Health Sciences. Linköping University, Department of Medicine and Care, Radiation Physics.
Show others and affiliations
2007 (English)In: Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, ISSN 1386-1425, Vol. 66, no 3, 754-760 p.Article in journal (Refereed) Published
Abstract [en]

Lithium formate (6LiOOCH·H2O), 95% 6Li enrichment, combined with an exchange of crystallization water with D2O was investigated. The ESR spectrum of the radiation induced free radicals stable at room temperature consists of a singlet with a narrow line width, 0.92 mT. 6Li has smaller magnetic moment and nuclear spin, which resulted in the narrower line width accompanied with an increase in peak amplitude. In comparison with lithium formate with natural isotopic composition, 6Li (7.5%, I = 1) and 7Li (92.5%, I = 3/2), the sensitivity was increased by a factor of two. With optimised spectrometer settings 6Li formate had seven times higher sensitivity compared to alanine. Therefore this material is proposed as a dosimeter material in a dose range down to 0.1 Gy. The g and the 13C-hyperfine (hf) tensors of the CO2- radical anion, major paramagnetic products, were evaluated to be g = (2.0037, 1.9975, 2.0017), and A(13C) = (465.5, 447.5, 581.3) MHz for polycrystalline samples at room temperature. Furthermore, the 1H-hf and 6Li-hf tensors observed for the surroundings of CO2- by ENDOR technique were in fairly good agreement with DFT calculations. The CO2- radicals are found to be so stable that the formate is applicable to the ESR dosimetry, because of fully relaxing in a fully relaxed geometrical structure of the CO2- component and remaining tight binding with the surroundings after the H atom detachment from HCO2-. © 2006 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 66, no 3, 754-760 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-38232DOI: 10.1016/j.saa.2006.04.023Local ID: 43056OAI: diva2:259081
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-11

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Gustafsson, HåkanLund, EvaLund, Anders
By organisation
Faculty of Health SciencesRadiation PhysicsDepartment of Radiation PhysicsThe Institute of TechnologyChemical Physics
In the same journal
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 75 hits
ReferencesLink to record
Permanent link

Direct link