Rotating CO2 - Centers in Coral and Related Materials
- 1 October 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (10R)
- https://doi.org/10.1143/jjap.29.2191
Abstract
Radiation-induced radicals in coral, single-crystal aragonite, synthetic calcite and calcium phosphates are studied by ESR at low temperatures. The isotropic ESR signal at g=2.0007, which is used for ESR dating of CaCO3, disappears below 200 K, and a spectrum with an anisotropic line shape is detected. The linewidth of the isotropic signal increases between 220 and 200 K with decreasing temperature. The g=2.0007 signal is attributable to rotating CO2 - ions.Keywords
This publication has 15 references indexed in Scilit:
- Radiation-induced paramagnetic species in natural calcite speleothemsInternational Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1989
- Influence of the Mg-content on ESR-signals in synthetic calcium carbonateInternational Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1989
- Electron Spin Resonance of Organic Radicals Derived from Amino Acids in Calcified FossilsJapanese Journal of Applied Physics, 1989
- ESR study of Gamma-ray irradiated synthetic calcium carbonatesInternational Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1989
- Electron Spin Resonance Dating of the Pleistocene Coral Reef Tracts of BarbadosQuaternary Research, 1988
- Comparison of ESR ages of corals from marine terraces with 14C and 230Th/234U agesEarth and Planetary Science Letters, 1983
- Overestimate of stalagmitic calcite ESR dates due to laboratory heatingNature, 1983
- Dating of Fossil Shells with Electron Spin ResonanceThe Journal of Geology, 1981
- EPR of CO2− Defects in Calcite: Motional and Nonsecular ContributionsThe Journal of Chemical Physics, 1970
- Motional Effects in the Electron Spin Resonance Absorption Spectrum of CO2– Molecule-Ions in Single-Crystal CalciteThe Journal of Chemical Physics, 1968