Electron-hole pair production by impact ionization in zinc selenide

Abstract

Measurements have been made of the ionization coefficient as a function of electrical field in znse. Hole and electron ionization coefficients are equal within the limits of the experiments. The results obtained are consistent with baraff's theory. Values of the scattering length lamda lie in the range 25-50 aa. An empirical relation has been found between lamda and the concentration of ionized impurities. The results are discussed in terms of the band structure of znse. The ionization coefficients are consistent with those of similar materials.