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EPR study of radicals produced by gamma-irradiation in marine mollusc (Venus sp.) fossils

Access

info:eu-repo/semantics/closedAccess

Date

2004

Author

Koseoglu, R
Koksal, F
Ciftci, E

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Abstract

In this study, gamma-irradiated marine mollusc (Venus sp.) fossils were investigated by electron paramagnetic resonance (EPR) at ambient temperature. Powder X-ray diffraction technique indicates that the Venus sp. fossils were made mainly of CaCO3. Before gamma-irradiation, the EPR lines of the powder of fossil samples showed the existence of Mn2+ (I = 5/2, 100% natural abundance) ions with g(av) = 2.0055 and A(av) = 9.4 mT gamma-Irradiation-induced additional defects in Venus sp. fossil were attributed to axial CO3- (gperpendicular to = 2.0171, g// = 2.0048), orthorhombic CO2- (g(x) = 2.0030, g(z) = 2.0018, g(y) = 1.9973, g(av) = 2.0007), freely rotating CO2- (g(iso) = 2.0007), isotropic SO2- (g = 2.0057), axial SO3- (g perpendicular to = 2.0036, g// = 2.0024) and isotropic SO3- (g = 2.0032) free radicals. The g-values of these free radicals were compared with the literature data belonging to similar defects.

Source

RADIATION EFFECTS AND DEFECTS IN SOLIDS

Volume

159

Issue

8.Eyl

URI

https://dx.doi.org/10.1080/10420150412331296862
https://hdl.handle.net/11480/5651

Collections

  • Makale Koleksiyonu [2055]
  • Öksüz Yayınlar Koleksiyonu - Scopus [2338]
  • Öksüz Yayınlar Koleksiyonu - WoS [2361]



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