Multifrequency EPR study on radiation induced centers in calcium carbonates labeled with¹³C

• Autorzy: Jarosław Sadło , Anna Bugaj , Grażyna Strzelczak , Marcin Sterniczuk , Zbigniew Jaegermann
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

aragonite; calcite; dosimetry; EPR spectroscopy; γ-irradiation; radicals

• Czasopismo: Nukleonika
• Rocznik: 2015
• Tom: 60
• Numer: 3
• Strony: 429-434

Daty

wydano

2015-07-01

otrzymano

2014-10-13

zaakceptowano

2015-01-30

online

2015-08-06

Twórcy

autor

Jarosław Sadło

• Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: [phone],

autor

Anna Bugaj

• Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: [phone]

autor

Grażyna Strzelczak

• Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: [phone]

autor

Marcin Sterniczuk

• Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: [phone]

autor

Zbigniew Jaegermann

• Institute of Ceramics and Building Materials, 9 sPostępu Str., 02-676 Warsaw, Poland

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Identyfikatory

DOI

10.1515/nuka-2015-0076