Electron spin resonance dating of toxodon tooth from upper Ribeira Valley, São Paulo, Brazil
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Radiation Protection Dosimetry
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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. 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 (De) was determined using single exponential fitting resulting in (24 ± 1)Gy. The
De 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. The ages cover the range of 25–34 ka. 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.
Como referenciar
KINOSHITA, ANGELA; GHILARDI, ALINE M.; FERNANDES, MARCELO A.; FIGUEIREDO, ANA M.G.; BAFFA, OSWALDO. Electron spin resonance dating of toxodon tooth from upper Ribeira Valley, São Paulo, Brazil. Radiation Protection Dosimetry, v. 172, p. 296-301, 2016. DOI: 10.1093/rpd/ncw195. Disponível em: http://repositorio.ipen.br/handle/123456789/27367. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.