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Rehabilitation of the Laboratoire De Carbone 14-Dakar (Senegal) with a Super Low-Level Liquid Scintillation Counting System

Published online by Cambridge University Press:  18 July 2016

Maurice Ndeye ,
Oumar Ka ,
Hamady Bocoum  and
Alpha O Diallo
Maurice Ndeye*
Affiliation:
LC14, Institut Fondamental d'Afrique Noire (IFAN), Université Cheikh Anta Diop, Dakar, Sénégal.
Oumar Ka*
Affiliation:
LC14, Institut Fondamental d'Afrique Noire (IFAN), Université Cheikh Anta Diop, Dakar, Sénégal.
Hamady Bocoum
Affiliation:
Laboratoire Préhistoire-Protohistoire, IFAN, Université Cheikh Anta Diop, Dakar, Sénégal.
Alpha O Diallo
Affiliation:
LC14, Institut Fondamental d'Afrique Noire (IFAN), Université Cheikh Anta Diop, Dakar, Sénégal.
*
Email: [email protected].
Corresponding author. Email: [email protected].
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Abstract

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Following the passing of Prof Cheikh Anta Diop in 1986, the radiocarbon laboratory (LC14) he created 20 yr earlier at the Institut Francophone d'Afrique Noire (IFAN), Dakar, Senegal, fell into a long hibernation. It took nearly 3 yr to renovate the laboratory and reinstall new equipment in order to return LC14 to full functionality and resume its activity. A new dating system has been implemented around a super low-level liquid scintillation spectrometer from Packard, the Tri-Carb 3170TR/LS, located in an underground room.

In this paper, we assess the performance of the dating setup (background level and figure of merit) using known samples from Paris 6 and international standards from the International Atomic Energy Agency (IAEA). After the calibration, the setup was used to study bolé seashells from the Khant area in the northern part of Senegal (West Africa). The aim is to present evidence of the correlation between the transgression of the Nouakchottan (5500 BP) and a few industries in the Khant area. The corresponding ages are difficult to assess and the dates available for this cultural site are randomly distributed, ranging from 4500 to 1500 BP, i.e., a chronological period spanning from the Neolithic to the Iron Age.

Type
Articles
Information
Radiocarbon , Volume 46 , Issue 1: Proceedings of the 18th International Radiocarbon Conference (Part 1 of 2), Conference Editors: Nancy Beavan Athfield, Rodger J Sparks , 2004 , pp. 117 - 122
Copyright
Copyright © 2004 by the Arizona Board of Regents on behalf of the University of Arizona 

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