Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10730229 | Applied Radiation and Isotopes | 2005 | 5 Pages |
Abstract
The archaeological dose (AD) was measured in three tooth samples of giant mammals that belonged to Brazilian megafauna using electron spin resonance (ESR) spectroscopy at X-band (ν â¼9.5 GHz) and K-band (ν â¼24 GHz). Samples were collected in Lagoa de Dentro, Puxinanã city in Paraiba, a northeast state in Brazil and were identified as Haplomastodon waringi (Holland) (two teeth) and one tooth sample of Xenorhinotherium bahiense (Cartele and Lessa). The average AD led to an age for the Haplomastodon samples of 11.6 ky bp. For one sample (Haplomastodon) K-band was also employed to evaluate the AD. The K-band spectrum had three components, determined using spectral simulation as follows: a wide isotropic line with g factor 2.0048, an orthorhombic line with gx=2.0034, gy=2.0022 and gz=1.9974, and another isotropic line with g factor 2.0008. The amplitude of these three signals increase with the added dose and the average dose found was 26±5 Gy. This result is compatible with the AD determined with X-band 21±3 Gy.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Angela Kinoshita, Alcina Magnólia Franca, José Augusto Costa de Almeida, Ana Maria Figueiredo, Patricia Nicolucci, CarlosF. O. Graeff, Oswaldo Baffa,