Thermoluminescence dating of Brazilian indigenous ceramics
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2009
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Resumo |
Two indigenous ceramics fragments, one from Lagoa Queimada (LQ) and another from Barra dos Negros (BN), both sites located on Bahia state (Brazil), were dated by termoluminescence (TL) method. Each fragment was physically prepared and divided into two fractions, one was used for TL measurement and the other for annual dose determination. The TL fraction was chemically treated, divided in sub samples and irradiated with several doses. The plot extrapolation from TL intensities as function of radiation dose enabled the determination of the accumulated dose (D(ac)), 3.99 Gy and 1.88 Gy for LQ and BN, respectively. The annual dose was obtained through the uranium, thorium and potassium determination by ICP-MS. The annual doses (D(an)) obtained were 2.86 and 2.26 mGy/year. The estimated ages were similar to 1375 and 709 y for BN and LQ ceramics, respectively. The ages agreed with the archaeologists` estimation for the Aratu and Tupi tradition periods, respectively. FAPESP Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) CNPq Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) |
Identificador |
RADIATION PROTECTION DOSIMETRY, v.136, n.1, p.45-49, 2009 0144-8420 http://producao.usp.br/handle/BDPI/29500 10.1093/rpd/ncp133 |
Idioma(s) |
eng |
Publicador |
OXFORD UNIV PRESS |
Relação |
Radiation Protection Dosimetry |
Direitos |
restrictedAccess Copyright OXFORD UNIV PRESS |
Palavras-Chave | #ERROR LIMITS #Environmental Sciences #Public, Environmental & Occupational Health #Nuclear Science & Technology #Radiology, Nuclear Medicine & Medical Imaging |
Tipo |
article original article publishedVersion |