Influence of medium on generation of localized charges in BeO by the exposure of the electrical discharge in air and oxygen

The EPR-method is used to investigate the regularity of the formation of paramagnetic $F^+$ and $V^-$ centers (PC) in BeO which are generated by barrier electrical discharge (ED) in air and oxygen under reduced pressure. It was determined that, at different powers of discharge or parameters E/P, the maximums of kinetic curves of PC- accumulation in oxygen in comparison with air plasma forming medium are changed with resspect to both their value and position, depending on the interaction of oxygen atoms and ions $O, O^+, O^-, O^+_2, O^-_2,\ldots$) with BeO surface. These exposures resulted in decreasing rate of generation of $F^+$ and $V^-$ centers in oxygen plasma in comparison with discharge in air (at t >t_max) and the difference of their concentration in the stationary region ($t\rightarrow\infty$) of PC-acumulation curves for the same E/P.