Human tooth EPR dosimetry with enhanced sensitivity

Rapid Passage Effects were used to suppress the background signal, thus enabling low -radiation accumulated dose determination. Together with optimal temperature and detection conditions, the suggested approach proved to provide EPR dosimetry in the most actual dose range between 10 and 200 rad.     

The Global-in-Time Existence of a Classical Solution for Some Free Boundary Problem

Siberian Mathematical Journal - We consider the problem with free (unknown) boundary for the one-dimensional diffusion–convection equation. The unknown boundary is found from the additional...     

EPR dosimetry sensitivity enhancement by detection of rapid passage signal of the tooth enamel at low temperature

The four-fold improvement of EPR signal-to-noise ratio for radiation-induced paramagnetic centres in comparison with a conventional way is achieved by detection of the tooth enamel EPR signal at 77 K and rapid passage conditions.     

Investigation of electroconductivity of lithium pentaferrite

Using a double-probe spreading resistance measurement technique combined with a layer-by-layer analysis, temperature dependences of electroconductivity of polycrystalline lithium pentaferrite (LPF), which is produced via a ceramic-production technological process, are investigated. It is shown that the electroconductivity activation energy of LPF is controlled by the height of grain-boundary potential barrier due to different degrees of grain boundary and grain bulk oxidation. A relationship is established between the value of the electroconductivity activation energy of LPF and the processes of its oxygen exchange with the surrounding medium during thermal annealing. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp.48–51, May, 2006.     

Diffusion of free radicals as studied by tomography

A linear magnetic field gradient superimposed on the main static field was used to study one-dimensional diffusion of perchlorotriphenylmethyl radicals in decalin and of oxygen molecules in polytetrafluoroethylene. A simple method is developed for deducing diffusion coefficients from both time-dependent and single-scan experiments provided that the natural linewidth is small relative to the field change over the diffusion distance.