Original Article | 2002, Vol.24, No.1, pp. 117-122
Radiation dose response of calcium carbonate crystal in marine shells samples
Sommai Changkian and Puangtip Kaewtubtim
pp. 117 - 122
Abstract
A study of the evolution of element, crystal structure and thermoluminescence signal versus gamma irradiation dose were carried out for calcite shells samples. The composition of element was studied by X-ray fluorescence spectrometer. As identified by X-ray diffraction and SEM/EDS analysis, two polymorphs of calcium-carbonate were extracted: calcite and aragonite. The evolution of TL signal versus gamma irradia tion dose using the TL reader (Harshaw 2000) was initially dependent on crystal structure and fading effect of the thermoluminescence signal .
