TL, OSL and C-14 dating results of the sediments and bricks from mummified nuns' grave
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Data
2012-06-01
Autores
Tudela, Diego R.G. [UNESP]
Tatumi, Sonia H. [UNESP]
Yee, Márcio [UNESP]
Brito, Silvio L.M. [UNESP]
Morais, José L.
Morais, Daisy de
Piedade, Silvia C.
Munita, Casimiro S.P.
Hazenfratz, Roberto
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ISSN da Revista
Título de Volume
Editor
Academia Brasileira de Ciências
Resumo
Este artigo apresenta os resultados de datação por TL e OSL de solos, e fragmentos de tijolos de um túmulo, que foi ocupado por duas freiras mumificadas encontradas no Mosteiro da Luz, localizado no Estado de São Paulo, Brasil. As idades encontradas por TL e OSL foram comparadas às obtidas a partir de C-14 dos colágenos contidos em amostras de osso das múmias. A maioria das idades obtidas são do século XVIII. A espectroscopia de radiação-gama foi utilizada para avaliar concentrações de radioisótopos naturais nas amostras e para calcular as taxas de dose anual que resultaram em 3,0 a 5,3 Gy/kano. As concentrações radioativas são próximas daquelas obtidas através de Análise por Ativação de Nêutrons. Os conteúdos de elementos U, Th e Ce são superiores aos encontrados na maioria dos sedimentos.
This paper presents the results of TL and OSL dating of soil and fragments of bricks from a grave, which was occupied by two mummified nuns, found at Luz Monastery, located in the state of São Paulo, Brazil. The TL and OSL ages were compared to C-14 dating ones obtained from bone collagens of the mummies. The majority of the ages is related to the eighteenth century. The gamma-ray spectroscopy was used to evaluate natural radioisotope concentrations in the samples, and by using these concentrations the annual dose rates, from 3.0 to 5.3 Gy/kyr, were obtained. Neutron activation analysis was performed and the radioisotope contents results are in agreement with those obtained by gamma-ray spectroscopy. The contents of U, Th and Ce elements were higher than those found in usual sediments.
This paper presents the results of TL and OSL dating of soil and fragments of bricks from a grave, which was occupied by two mummified nuns, found at Luz Monastery, located in the state of São Paulo, Brazil. The TL and OSL ages were compared to C-14 dating ones obtained from bone collagens of the mummies. The majority of the ages is related to the eighteenth century. The gamma-ray spectroscopy was used to evaluate natural radioisotope concentrations in the samples, and by using these concentrations the annual dose rates, from 3.0 to 5.3 Gy/kyr, were obtained. Neutron activation analysis was performed and the radioisotope contents results are in agreement with those obtained by gamma-ray spectroscopy. The contents of U, Th and Ce elements were higher than those found in usual sediments.
Descrição
Palavras-chave
datação, Termoluminescência (TL), Luminescência Opticamente estimulada (LOE), Freiras Mumificadas, Mosteiro da Luz, dating, Thermoluminescence (TL), Optical stimulated Luminescence (OSL), Mummified Nuns, Mosteiro da Luz
Como citar
Anais da Academia Brasileira de Ciências. Academia Brasileira de Ciências, v. 84, n. 2, p. 237-244, 2012.