Production of low-energy electrons by ionizing radiation

摘要

Low-energy electrons are involved in almost all of the physical,physico-chemical and chemical phenomena underlying radiation chemistry and play a central role in determining the effects of ionizing radiation chemistry.A detail quantitative description of their production is desirable,but not available in even the simplest liquids.The distribution defining the cascade of low-energy electrons produced in the radiolysis of liquid water is characterized.The most probable energy and mean energy for secondary electron produced by a primary ion are ~9-10 and 50-60 eV,respectively,depending on the specific energy of the primary ion.The energy spectrum of the sub-excitation electrons produced by attenuation of all electrons to < 25 eV is determined,and its mean is also 9 eV.