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TL, OSL and C-14 dating results of the sediments and bricks from mummified nuns' grave

Tudela, Diego R.G.; Tatumi, Sonia H.; Yee, Márcio; Brito, Silvio L.M.; Morais, José L.; Morais, Daisy de; Piedade, Silvia C.; Munita, Casimiro S.P.; Hazenfratz, Roberto
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica
ENG
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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.