Elixir Online Journal

CATEGORIES

Architecture and Design

Cement and Concrete Composites Historic Preservation Sustainable Architecture

Arts and Social Science

Literature Linguistics and Translation Social Science

Biomedical and Life Sciences

Applied Botany Applied Biology Aquaculture Bio-Physics Bio Technology Food Science Hormones and Signaling Semen Dilution and Freezing Biomedical Science and Technology

Business Administration, Management and Economics

Finance Management International Business Management Human Resource Management Marketing Management Management Arts Production Management Tourism Management Project Management

Chemistry and Materials Science

Applied Chemistry Chemical Physics Computational Chemistry Corrosion Chemical Physics Letters Organic Chemistry Optical Materials Nanocomposite Materials Semiconductor Materials Nanotechnology Liquid Crystal Technology Dye Chemistry Magnetic Materials

Discrete Mathematics and Cryptography

Applied Mathematics Cryptology Discrete Mathematics Statistics Advances in Pure Mathematics

Earth and Environmental Science

Agriculture Bio-Diversity Pollution Remote Sensing Meteorology Geoscience Infrastructure Management Horticultural Science

Engineering

Advanced Engineering Informatics Adoc Network Chemical Engineering Control Engineering Electrical Engineering Computer Science and Engineering Mechanical Engineering Network Engineering Power Electronics Engineering Thermal Engineering Nanosensors Image Processing Renewable Energy Engineering

Education

Educational Technology Leadership Management Psychology Social Studies Mathematics Education

Humanities and Law

Criminal Law International Law

Medical Science

Human-Physiology Pharmacy Virus Research Dentistry Forensic Serology

Physics and Astronomy

Advanced Powder Technology Crystal Growth Crystal Research Technology Polymer Space Science Vibrational Spectroscopy Ultrasonics Thin Film Technology Nuclear and Radiation Physics

Short Communication

Comments Criticism

Announcement

Editor-in-Chief

ISSUE

Current Issues

May2013

Past Issues

April 2013
March 2013
February 2013
January 2013
2012
2011

Electron spin resonance dating and XRD analysis of archaeological bone samples recently excavated in Karnataka, India

Author:R.Ramya and G.Velraj

Abstract:
The study of radiation defects created in biomaterials, such as bones can be used in dating with importance to paleontology and archaeology. A preliminary attempt has been made to date the bone samples recently excavated from the archaeological site Gudnapur in Karnataka state, India. Each sample was divided into five sets which were given an artificial dose (AD) by using Î³ irradiation of 50 Gy, 300 Gy, 800 Gy, 1500 Gy and 3200 Gy. All the samples show similar EPR spectra having g-values 2.0026, 2.0025 and 2.0013 corresponding to orthorhombic CO2- and axial CO2- respectively. These signals have been used for the age estimation of the archaeological bone samples assuming the dose rate to be 6.8 mGy/a. The calculated ages of the samples are 36 ? 24 ka, 12 ? 87 ka and 19 ? 83 ka. These samples correspond to the upper stage of the Pleistocene epoch respectively and in good agreement with age predicted by archaeological Department. X-ray diffraction studies revealed the transformation of the mineral components partially into fluoroapatite form with addition of goethite, quartz phases and with preserved collagen remains. The aim was to establish their degree of preservation and possibilities of inferring the life conditions from them.