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EPR dating CO{sub 2}{sup -} sites in tooth enamel apatites by ENDOR and triple resonance

Abstract

In this work we combine electron paramagnetic resonance (EPR), high-resolution electron nucleus double resonance (ENDOR) and general triple resonance (GTR) spectroscopies, to study the local environment of the CO{sub 2}{sup -} groups created by ionizing radiation in fossil tooth enamel. We demonstrate that the CO{sub 2}{sup -} groups occupy slightly modified phosphate sites in the hydroxyapatite lattice. In quaternary shark enamel we found these groups to be interacting with water molecules in the apatite channels. The absence of water molecules as first neighbours in mammalian samples indicate, however, that these molecules are not significantly responsible for the stabilization of CO{sub 2}{sup -} dating centers in enamel. (author).
Authors:
Vugman, N V; [1]  Rossi, A M; [2]  Rigby, S E.J. [3] 
  1. Universidade Federal, Rio de Janeiro, RJ (Brazil). Inst. de Fisica
  2. Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)
  3. University Coll., London (United Kingdom). Dept. of Biology
Publication Date:
May 01, 1995
Product Type:
Journal Article
Reference Number:
SCA: 400101; 580000; 665100; PA: AIX-26:062359; EDB-95:124810; SN: 95001457535
Resource Relation:
Journal Name: Applied Radiation and Isotopes; Journal Volume: 46; Journal Issue: 5; Other Information: PBD: May 1995
Subject:
40 CHEMISTRY; 58 GEOSCIENCES; 66 PHYSICS; TEETH; ELECTRON SPIN RESONANCE; ISOTOPE DATING; CARBON DIOXIDE; CRYSTAL LATTICES; FOSSILS; SAMPLE PREPARATION; SPECTROSCOPY
OSTI ID:
100059
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ARISEF; ISSN 0883-2889; TRN: GB9501278062359
Submitting Site:
GBN
Size:
pp. 311-315
Announcement Date:
Oct 02, 1995

Citation Formats

Vugman, N V, Rossi, A M, and Rigby, S E.J. EPR dating CO{sub 2}{sup -} sites in tooth enamel apatites by ENDOR and triple resonance. United Kingdom: N. p., 1995. Web. doi:10.1016/0969-8043(94)00154-R.
Vugman, N V, Rossi, A M, & Rigby, S E.J. EPR dating CO{sub 2}{sup -} sites in tooth enamel apatites by ENDOR and triple resonance. United Kingdom. doi:10.1016/0969-8043(94)00154-R.
Vugman, N V, Rossi, A M, and Rigby, S E.J. 1995. "EPR dating CO{sub 2}{sup -} sites in tooth enamel apatites by ENDOR and triple resonance." United Kingdom. doi:10.1016/0969-8043(94)00154-R. https://www.osti.gov/servlets/purl/10.1016/0969-8043(94)00154-R.
@misc{etde_100059,
title = {EPR dating CO{sub 2}{sup -} sites in tooth enamel apatites by ENDOR and triple resonance}
author = {Vugman, N V, Rossi, A M, and Rigby, S E.J.}
abstractNote = {In this work we combine electron paramagnetic resonance (EPR), high-resolution electron nucleus double resonance (ENDOR) and general triple resonance (GTR) spectroscopies, to study the local environment of the CO{sub 2}{sup -} groups created by ionizing radiation in fossil tooth enamel. We demonstrate that the CO{sub 2}{sup -} groups occupy slightly modified phosphate sites in the hydroxyapatite lattice. In quaternary shark enamel we found these groups to be interacting with water molecules in the apatite channels. The absence of water molecules as first neighbours in mammalian samples indicate, however, that these molecules are not significantly responsible for the stabilization of CO{sub 2}{sup -} dating centers in enamel. (author).}
doi = {10.1016/0969-8043(94)00154-R}
journal = {Applied Radiation and Isotopes}
issue = {5}
volume = {46}
journal type = {AC}
place = {United Kingdom}
year = {1995}
month = {May}
}