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

Author:

Tudela Diego R.G.1,Tatumi Sonia H.1,Yee Márcio1,Brito Silvio L.M.1,Morais José L.2,Morais Daisy de2,Piedade Silvia C.2,Munita Casimiro S.P.3,Hazenfratz Roberto3

Affiliation:

1. UNESP, Brasil

2. Universidade de São Paulo, Brasil

3. Comissão Nacional de Energia Nuclear, Brasil

Abstract

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.

Publisher

FapUNIFESP (SciELO)

Subject

Multidisciplinary

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