Applied Radiation and Isotopes 2002-06-01

Investigation of the NMR relaxation rate dose-response of a ceric sulphate dosimeter.

S A J Bäck, M Lepage, C Baldock

Index: Appl. Radiat. Isot. 56(6) , 895-9, (2002)

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Abstract

The relationship between the radiation absorbed dose and the NMR longitudinal and transversal relaxation rates, R1 and R2, respectively, of a ceric sulphate dosimeter was examined. By adding copper sulphate, the R1 and R2 dose-responses were found to be linear up to 60 kGy with dose sensitivities of 13 x 10(-6) and 15 x 10(-6) s(-1) Gy(-1) , respectively. There is thus the potential for a three-dimensional ceric dosimeter for high dose applications, provided a suitable gelling substance is used.