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Esr dating and dosimetry

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Introduction to ESR and chronology science and principle of ESR dating and dosimetry are described with applications to actual problems according to materials.The study of radiation defects created in biomaterials, such as bone and teeth, can be used in dating with importance to palaeontology and archaeology.Electron spin resonance (ESR) dating was applied to date a sample of fossil tooth found in Ribeira Valley, São Paulo, Brazil.This region is characterized by abundant fossil records of Pleistocene–Holocene South American megafauna belonging to different faunistic moments related to climate changes during the quaternary.

A number of molluskan species have been dated successfully by ESR. In addition, the work compares several proposed methodologies for determining the accumulated radiation dosage by ESR.

In this context, electron spin resonance (ESR) dating of megafauna samples provides important information for establishing a chronological background.

This work presents the ESR dating of two teeth, one of Gomphotheriidae and other of Toxodontinae.

As the number of fossils dated is not too large, the dating of materials from this region will provide important information to better understand the events associated with the presence and extinction of these species.

The equivalent dose ( was converted to age using ROSY ESR Dating program and the concentration of radioisotopes present in the sample and soil determined through neutron activation analysis. This information is important to contextualize other findings in the region from different sites and to help obtain better information about the climate changes in this region.