Radiation dose response of calcium carbonate in marine shells

Sommai Changkian, D. of Sci., F. of Sci. and Tech., PSU.
Pongtip Kaewtuptim, D. of Sci., F. of Sci. and Tech., PSU.
E-mail : csommai@bunga.pn.psu.ac.th

Grant : Prince of Songkla University, Pattani Campus
Published : Research Report
Key words : marine shells, radiation dose response, calcium carbonate, thermoluminescence

A study of the evolution of element, crystal structure and thermoluminescence signal versus gamma irradiation dose has been made for marine shells. Composite element has been study by X-ray fluorescence. As identified by X-ray diffraction and SEM/EDS Analysis, two polymoph of calcium-carbonate were extracted : calcite and aragonite. Evolution of TL signal versus gamma irradiation dose using the TL reader (Harshaw 2000) is initially dependent on cryscal structure and fading effect of the thermoluminescence signal.

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