EFFECT OF SOLUTE MASS AND SOLVENT PH ON LYOLUMINESCENT SACCHARIDES USED FOR GAMMA-RAY DOSIMETRY

The lyoluminescence yield in gamma-irradiated glucose, lactose and man nose has been studied, to look for the effect of mass at different dos es and solvent pi-Is on the yield. It is seen that the light yield per mg (Y/m) is different for different solute masses and its nature of v ariation with mass is independent of irradiation dose and solvent pH. Further, Y/m is independent of pH in the range 4-9. No significant dep endence of Y/m on solute mass is found above a certain mass, the level -off point. Estimation of a dose, when it is necessary to be carried o ut by using a solute mass below the level-off point, therefore, has to be made with reference to the particular Y/m vs dose curve drawn for that solute mass. Copyright (C) 1997 Elsevier Science Ltd