Electron spin resonance (ESR), electron nuclear double resonance (ENDOR) and general triple resonance of irradiated biocarbonates

Dose estimation, kinetics and dating of fossil marine mollusc shells from northwestern part of Turkey

“…4b. Similar ESR spectra were also obtained for another carbonate shell samples (Molodkov, 1993;Schramm and Rossi, 1996).…”

“…The ESR spectrum (Fig. 4a) of natural marine shell samples consist of many ESR signal but the most distinguishable ones at g x ¼2.0030, g z ¼2.0015 and g y ¼1.9980 are attributed to orthorhombic CO 2 − centers by Schramm and Rossi (1996) and Strzelczak et al (2001). Another observed ESR lines at the low field side of the natural sample spectrum with g ¼2.0056 value associated with isotropic SO 2 − center (Barabas, 1992a;Ikeya, 1993;Schramm and Rossi, 1996;Seletchi and Duliu, 2007).…”

Thermally stimulated transformation of the EPR spectra in γ-irradiated bone tissue

“…In contrast to the enamel further increase of annealing temperature leads to the reduction of the amount of both types of centers that excluded the prevailing of axial centers by thermal treatment of samples. Among other behavioral differences in the annealing of bone tissue compared to tooth enamel, we noted the absence of the isotropic EPR signal with g ¼ 2.0060 caused by SO 2 À radicals (Schramm and Rossi, 1996) and considerably higher intensity of the signal from organic component.…”

ENDOR study of irradiated tooth enamel

“…EPR spectrum at g = 2.006 and ∆H pp = 0.1 mT was observed too. It has been attributed to SO 2 radical [26]. ENDOR signals caused by (CH 3 )-C-R and SO 2 radicals were not observed.…”