Direct dating of human fossils

Grün, Rainer

doi:10.1002/ajpa.20516

Cited by 125 publications

(57 citation statements)

References 221 publications

(219 reference statements)

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“…Saturation effects have been reported only at doses beyond those of interest for retrospective dosimetry. It is worth noting that Grün argues that linear fitting should be completely abandoned in dating studies, in spite of the presence of "apparent linearity" in the ranges far below saturation (Grün 1996(Grün , 2006a. It seems reasonable to assume that, in retrospective dosimetry, deviation from linearity at the high-dose end is less likely than in dating.…”

Section: Consequences For the Linearity Of The Dose Responsementioning

confidence: 99%

EPR dosimetry with tooth enamel: A review

Fattibene

Callens

2010

Applied Radiation and Isotopes

212

160

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When tooth enamel is exposed to ionizing radiation, radicals are formed that can be detected using Electron Paramagnetic Resonance (EPR) techniques. EPR dosimetry using tooth enamel is based on the (presumed) correlation between the intensity or amplitude of some of the radiation-induced signals with the dose absorbed in the enamel. In the present paper a critical review is given of this widely applied dosimetric method.The first part of the paper is quite fundamental and deals with the main properties of tooth enamel and several of its model systems (e.g., synthetic apatites). Considerable attention is also devoted to the numerous radiation-induced and native EPR signals, and the radicals responsible for them. The relevant EPR detection, identification and spectrum analysing methods are reviewed from a general point of view. Finally, the need for solid state modelling and the linearity of the dose response are investigated.The second part is devoted to the practical implementation of EPR dosimetry using enamel. It concerns the preparation of samples, specific irradiation problems, spectrum acquisition and it is described how the dosimetric signal intensity and dose can be retrieved from the EPR spectra. Special attention is paid to the energy dependence of the EPR response and to sources of uncertainties. Results of and problems encountered in international intercomparisons and epidemiological studies are also dealt with.In the final chapter the future of EPR dosimetry with tooth enamel is analysed.

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Section: Consequences For the Linearity Of The Dose Responsementioning

confidence: 99%

EPR dosimetry with tooth enamel: A review

Fattibene

Callens

2010

Applied Radiation and Isotopes

212

160

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“…En este trabajo no se determinó la concentración de estos elementos en el esmalte y la dentina, ya que su proporción se considera despreciable en muestras que datan del holoceno (Kinoshita, et al, 2008;Hefne, et al, 2002). El valor "insignificante" de estas cantidades se debe a su corto período de enterramiento, el cual se considera así en el sentido de la formación de radioisótopos dentro del esmalte y la dentina, los cuales se hallan en valores significativos más allá de los 20.000 años antes del presente (Grün, 1989;Grün, 2006;Jonas, 1997;Rink, et al, 1996), pero no así para los últimos diez mil años. La información previa suministrada por Groot (1992), en el sentido de que los habitantes del lugar del hallazgo arqueológico habrían vivido allí en la época prehispánica, entre los 8.500 y 3.000 años antes del presente, época de cazadores y recolectores en Colombia, contribuyó a la decisión de despreciar dichas cantidades.…”

Section: Resultsunclassified

“…Las muestras de estalactita, conchas, corales, hueso, cuarzos, feldespatos y esmalte dental, por ejemplo, se datan mediante la RPE debido a su capacidad de acumular radicales libres por efecto de las radiaciones (Ülkü, 2004, Watanabe, et al, 2003, Renfrew, et al, 1992, Jonas, 1997, Walker, 2005, Grun, 1989, 2006.…”

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Datación de restos arqueológicos encontrados en Checua (Cundinamarca - Colombia) mediante resonancia paramagnética electrónica

Carvajal¹,

Montes²,

Almanza³

2014

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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ResumenEn este trabajo se presentan los resultados obtenidos al datar por medio de resonancia paramagnética electrónica (RPE) muestras de esmalte dental humano provenientes del sitio arqueológico de Checua, situado a 5º 04' de latitud norte y a 73° 53' de longitud este, a una altitud de 3.600 m sobre el nivel del mar, y a 60 km al noreste de Bogotá. El esmalte dental se irradió con rayos gama y los radicales libres producidos se cuantificaron usando un espectrómetro de RPE, banda X. A partir de la curva de intensidad de la señal RPE, comparada con la dosis absorbida por el esmalte, se hizo un ajuste que permitió obtener la dosis media arqueológica acumulada en el esmalte (D E ) durante el periodo de enterramiento de la muestra. El valor obtenido fue de 3,0 ± 0,08 Gy. Para estimar la edad de la muestra se usó el programa computacional ROSY, obteniendo una edad media del individuo de 5.021 ± 202 años antes del presente. La edad de las muestras corresponde a seres humanos que vivieron en el periodo cuaternario, en la época del holoceno. Los resultados obtenidos muestran el potencial de la técnica RPE como herramienta de datación de muestras cuaternarias en Colombia y abre la posibilidad de usarla en otro tipo de muestras como estalagmitas, calcitas, conchas de moluscos y corales. Este trabajo es el tercero realizado en Colombia en este campo después del trabajo de tesis de Sandoval y Carvajal (Sandoval 2010, Carvajal 2011 a,b).Palabras clave: EPR, esmalte dental, datación arqueológica. Electron paramagnetic resonance dating of archaeological rests from Checua (Cundinamarca -Colombia) AbstractThis paper presents the results obtained from using electron paramagnetic resonance (EPR) to analyse human tooth enamel found at the Checua archaeological site (Cundinamarca, Colombia), located 5º 04' latitude north and 73° 53' longitude east, 3,600 m above sea level and 60 km northeast of Bogotá. The tooth enamel was irradiated with gamma rays and the resulting free radicals were measured using an electron spin resonance (ESR) X-band spectrometer. Comparing the RPE signal intensity curve to the absorbed dose, it was possible to adjust this curve, which allowed us to obtain the mean archaeological dose accumulated in the enamel (D E ) during the period it was buried. The resulting value was 3.20 ± 0.08 Gy. By using the ROSY software, the mean age was estimated at 5021 ± 202 years before present (BP). This age corresponds to human beings who lived in the Quaternary period, Holocene epoch. These results show the EPR technique potential as a tool for dating Quaternary samples in Colombia and open the possibility of using it in stalagmite, calcite, mollusc shell and coral reef samples. This study is the third conducted in Colombia after the thesis work by Carvajal and Sandoval (Sandoval, 2010, Carvajal, 2011.Key words: EPR/ESR, tooth enamel, Colombia, archaeological dating. IntroducciónEl hombre siempre ha mostrado gran interés por su origen y su desarrollo a través de los tiempos, preguntándose sobre el qué, el cómo, el dónde y el...

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“…Both morphological and instrumental methods were used to determine the age at inhumation [3][4][5][6][7]. From a forensic point of view correct interpretation of the events surrounding death depends on the taphonomic process, distinguishing possible scavenger modifications from perimortem trauma.…”

Section: Methods and Processmentioning

confidence: 99%

Dental Contribution to an Anthropological Forensic Case Work of Skeletal Remains in Miglionico Countryside (South Italy)~!2010-01-16~!2010-04-29~!2010-07-14~!

Nuzzolese¹,

Liuzzi²,

Quarta³

et al. 2010

TOANTHJ

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This report contains the results of a forensic study of human remains discovered by a forester in the countryside surrounding Miglionico (Southern Italy) in August 2007. A total of 286 bone fragments were excavated at the scene and an osteological analysis was carried out by two forensic pathologists, one of which had a anthropological background. A forensic odontologist was also involved to ascertain the completeness of the skeletons and to make an inventory of the skeletal material. It was hoped also to establish a cause of death and period in which it occurred, and if possible to attempt to identify the individual. Age and odontological assessment was also provided. This report will highlight the contribution of an odontological and radiological analysis in relation to fragments of maxillary bones with teeth in situ, and also with teeth lost post-mortem. Findings from morphological, dental and radiological examination, UV illumination in the compact bones and radioisotope scan ( 14 C) revealed these skeletal remains belonged to at least three separate individuals, dating between 600 and 1000 AD, and therefore having archaeological significance.The case shows the relevance of forensic odontology in an anthropological evaluation which deals with discovered human remains of jaws and teeth.

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Direct dating of human fossils

Abstract: The methods that can be used for the direct dating of human remains comprise of radiocarbon,

Cited by 125 publications

References 221 publications

EPR dosimetry with tooth enamel: A review

EPR dosimetry with tooth enamel: A review

Datación de restos arqueológicos encontrados en Checua (Cundinamarca - Colombia) mediante resonancia paramagnética electrónica

Dental Contribution to an Anthropological Forensic Case Work of Skeletal Remains in Miglionico Countryside (South Italy)~!2010-01-16~!2010-04-29~!2010-07-14~!

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