Browsing IV. Eurasian conference on nuclear science and its application : presentations, 31 October- 3 November 2006. Baku, Azerbaijan. by All Authors "46977"
(Azerbaijan National Academy of Sciences Institute of Radiation Problems ve Turkish Atomic Energy Authority, 2006) Atlıhan, M. A.; Koşal, M.; Meriç, N.; 46977; Bölüm Yok
Atoms and molecules taking energy from surroundings will be unstable. When these atoms and molecules are stimulated, they turn back ground state. During this passing time light is emitting from them. This phenomenon is called luminescense. Luminescence resulted from light stimulation is called optically stimulated luminescence (OSL).
Energy is absorbed by a sample from flux of radiation is proportional to luminescense quantity occuring result of stimulation. The absorbed radiation energy is called equivalent dose. The quantity of luminescence due to equivalent dose is known as natural OSL.
There are several techniques to evaluate the equivalent dose. Principally, in evaluating the equivalent dose, the natural OSL from sample is compared with OSL of same or similar sample that is irradiated with a calibrated radioisotope source.
The equivalent dose may be used in dating in archaeological and geological materials. It can be determined that age of historical ruins or occurence time of still apprearing trace of important natural events by dating. Optically stimulated luminescence methods have used for dating in archeological and geological samples since 1980’s . The basic process is measurement of naturel (absorbed dose in buried duration) and annual (absorbed dose in buried in a year) dose of sample for dating.
That is, annual dose represents yearly dose rate is absorbed from the flux of nuclear radiation provided thorium-232, uranium-238 and potassium-40 in material and soil as well as by cosmic rays. İt is possible to evaluate the annual dose by determining the concentration of radioelements in a sample. The age can be calculated from the ratio of naturel dose to annual dose.
In this study, determine the annual dose and the potential of OSL for determination of equivalent dose in geological samples taken from trench opened in Denizli in Turkey was investigated.