Radiation damage centers in cholesteryl heptanoate

Acta Physica Polonica A · Temmuz 2013

Makale Bilgileri

DergiActa Physica Polonica A

Yayın TarihiTemmuz 2013

Cilt / Sayfa124 · 70-73

DOI10.12693/APhysPolA.124.70

Scopus ID2-s2.0-84879068993

Erişim🔓 Açık Erişim

Özet Cholesterol takes part significantly in many biological mechanisms and as important component for manufacture of bile acids, steroid hormones, and several fat-soluble vitamins. To determine magnetic properties of cholesteryl heptanoate (C34H58O2) which is an important cholesteryl ester in human life and new technology, the single crystals of cholesteryl heptanoate were grown by slow evaporation of concentrated ethyl acetate solution and the grown single crystals were irradiated at room temperature with 60Co ray. The radical produced by gamma irradiation has been investigated in the range of temperatures 123-330 K for different orientations of the crystal in a magnetic field by EPR. Radiation damage center was attributed to radical C-HCH2. The g factor and hyperfine coupling constants have slight dependence on temperature and evident dependence on the orientation of the magnetic field. Determined g factor and hyperfine coupling constants for the radical C-HCH2 were found to be anisotropic with the average values gav = 2:0036, (aCH)av = 14:52 G, (aCH)av = 25:78 G.