Petin V G, Morozov I I, Semkina M A
Radiats Biol Radioecol. 2010 May-Jun;50(3):355-60.
A simple approach to the estimation of UV light dose produced by Cerenkov emission and concomitant irradiation of biological objects with ionizing radiation was suggested. The approach was applied to determine the dependencies of UV light dose (equivalent to 254 nm) accompanied 100 Gy of ionizing radiation on the energy of sparsely ionizing radiation and on the volume of the exposed Escherichia coli cells suspension. It was revealed that the relative excitation contribution to the total lethal effect and the value of the UV dose was greatly increased with an increase in the energy of ionizing radiation and the volume of irradiated suspensions. It is concluded that these observations are in agreement with the supposition that Cerenkov emission is responsible for the production of UV light damage and the phenomenon of photoreacrivation observed after ionizing exposure of bacterial and yeast cells hypersensitive to UV light. A possible synergistic interaction of the damages produced by ionizations and excitations as well as a probable participation of UV component of ionizing radiation in the mechanism of radiation hormesis and adaptive response observed after ionizing radiation exposure is discussed.
提出了一种简单的方法来估算切伦科夫辐射产生的紫外光剂量，以及同时用电离辐射照射生物物体的情况。该方法用于确定伴随100 Gy电离辐射的紫外光剂量（相当于254 nm）对稀疏电离辐射能量和暴露的大肠杆菌细胞悬液体积的依赖性。结果表明，随着电离辐射能量和辐照悬液体积的增加，相对激发对总致死效应的贡献以及紫外剂量的值大大增加。得出的结论是，这些观察结果与以下假设一致：切伦科夫辐射是造成紫外光损伤以及在对紫外光敏感的细菌和酵母细胞电离照射后观察到的光复活现象的原因。讨论了电离和激发产生的损伤可能的协同相互作用，以及电离辐射的紫外成分可能参与电离辐射暴露后观察到的辐射兴奋效应和适应性反应机制。
