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Radiation Protection Dosimetry 2009 134(2):102-106; doi:10.1093/rpd/ncp015
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© The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Dosimetric evaluation of lithium carbonate (Li2CO3) as a dosemeter for gamma-radiation dose measurements

R. Popoca1 and F. Ureña-Núñez2,*

1 Facultad de Medicina, Universidad Autónoma del Estado de México, Paseo Tollocan S/N, CP 50180, Toluca Edo. de México, México
2 Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, CP 11801, Ocoyoacac Edo. de México, México

* Corresponding author: fernando.urena{at}inin.gob.mx

Received June 24, 2008, amended December 16, 2008, accepted January 25, 2009

This work reports the possibility of using lithium carbonate as a dosimetric material for gamma-radiation measurements. Carboxi-radical ions, CO2– and CO3–, arise from the gamma irradiation of Li2CO3, and these radical ions can be quantified by electron paramagnetic resonance (EPR) spectrometry. The EPR-signal response of gamma-irradiated lithium carbonate has been investigated to determine some dosimetric characteristics such as: peak-to-peak signal intensity versus gamma dose received, zero-dose response, signal fading, signal repeatability, batch homogeneity, dose rate effect and stability at different environmental conditions. Using the conventional peak-to-peak method of stable ion radicals, it is concluded that lithium carbonate could be used as a gamma dosemeter in the range of 3–100 Gy.


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