THE NEW APPROXIMATION OF DOSE ATTENUATION CURVE IN CONCRETE

Abstract The analytical approach in shielding calculations is simple and fast method for quick estimations. But it provides less accuracy than Monte-Carlo one. Often the exponential attenuation of dose in shielding is considered. But also it is necessary to take into account the dose increase in the first layers of shielding due to initial accumulation of neutrons. The new approximation of dose attenuation curve in concrete is offered for quick analytical estimations of shielding of hadron accelerators. It allows to make fast estimation of shielding thickness enough correctly

The Sensitivity of Resting Eggs of the Cladoceran Moina macrocopa to the Effect of Ionizing Radiation during the Reactivation of the Eggs

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.We investigated the sensitivity of resting eggs of the cladoceran Moina macrocopa to the effect of ionizing radiation during the reactivation of the eggs. The study showed that the resting eggs during reactivation are more vulnerable to irradiation than the resting eggs in a stage of deep dormancy. The decrease in the efficiency of egg reactivation was observed at high doses, the growth rate of juveniles, fecundity, and the number of produced clutches by females strongly decreased when resting eggs at the reactivation stage absorbed doses of 64 Gy and higher