抄録
Transient Photoconductivity of additively colored KCl is studied for excitation in the F, K, L1 and L2 bands at low temperatures down to 1.3°K. Electron quantum yield is found near unity in L bands and in high energy tail of K band in the whole temperature range. K band can be divided into two components; K1 band with low electron yield and K2 band with unit yield. It is concluded K2 band corresponds to transition to the conduction band minimum and L bands to the states in the conduction band. Electron yield for K1 and F bands is studied as a function of temperature and applied electric field. Thermal binding energy of excited state is found the same for K1 and F states. Field ionization from K1 state starts at far lower field than from F state. Transport of electrons at low temperature is characterized by non-ohmic behavior above critical field, where electron Schubweg is proportional to E0.5∼0.7. The high field behavior can be understood as hot electron phenomena.
