1984 Volume 33 Issue 12 Pages 847-852
A measurement system for lyoluminescence has been constructed using a photon-counting apparatus equipped with a highly sensitive photomultiplier and a microcomputer for a data acquisition and processing. For the lyoluminescent dosimetry, seven saccharide samples, including five monosaccharides (glucose, mannose, galactose, levulose and ribose) and two disaccharides (sucrose and trehalose), were irradiated with 60Co gamma rays. Effects on lyoluminescence were examined of the amounts of the sample, concentration of luminol phosphor in an aqueous solution, elapsed time after mixing the samples in the solution, variations of absorbed doses, annealing treatments and different radiation fields.
The results revealed that relatively small amounts of sample, say 3 mg, is sufficient for reproducible routine analyses by using 125 mg luminol/l for 10 s data accumulation, and that the lyoluminescent dosimetry is useful for the significantly high dose regions of 1 Gy-10kGy (the use of galactose and trehalose can extend the dose-region to higher levels) . The comparison of sensitivity for samples with the same dose (215 Gy) showed the great luminescent changes over one order of magnitude between the highest value for galactose and lowest one for ribose, although there is no substantial difference in the structure. No meaningful radiationquality effect was observed for monosaccharides irradiated with gamma-rays, X-rays, and neutrons.
