Multifrequency EPR study on radiation induced centers in calcium carbonates labeled with 13C

Jarosław Sadło; Anna Bugaj; Grażyna Strzelczak; Marcin Sterniczuk; Zbigniew Jaegermann

doi:10.1515/nuka-2015-0076

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Multifrequency EPR study on radiation induced centers in calcium carbonates labeled with 13C

Nukleonika

Volume 60 (2015): Issue 3 (September 2015)

By: Jarosław Sadło, Anna Bugaj, Grażyna Strzelczak, Marcin Sterniczuk and Zbigniew Jaegermann

Open Access

|Aug 2015

Abstract

In calcite and aragonite, γ-irradiated at 77 K, several paramagnetic centers were generated and detected by EPR spectroscopy; in calcite, CO₃⁻ (orthorhombic symmetry, bulk and bonded to surface), CO₃³⁻, NO₃²⁻, O₃⁻, and in aragonite CO₂⁻ (isotropic and orthorhombic symmetry) depending on the type of calcium carbonate used. For calcium carbonates enriched with ¹³C more detailed information about the formed radicals was possible to be obtained. In both natural (white coral) and synthetic aragonite the same radicals were identified with main differences in the properties of CO₂⁻ radicals. An application of Q-band EPR allowed to avoid the signals overlap giving the characteristics of radical anisotropy.

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Articles in this issue

DOI: https://doi.org/10.1515/nuka-2015-0076 | Journal eISSN: 1508-5791 | Journal ISSN: 0029-5922

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Language: English

Page range: 429 - 434

Submitted on: Oct 13, 2014

Accepted on: Jan 30, 2015

Published on: Aug 6, 2015

Published by: Institute of Nuclear Chemistry and Technology

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

calcite,

Related subjects:

Physics,

Astronomy and astrophysics,

Physics, other

© 2015 Jarosław Sadło, Anna Bugaj, Grażyna Strzelczak, Marcin Sterniczuk, Zbigniew Jaegermann, published by Institute of Nuclear Chemistry and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Volume 60 (2015): Issue 3 (September 2015)