Release of electrons from traps by an electric field with phonon participation

The flash intensity of the ZnS‐Cu phosphor induced by external de field applied after excitation with ultraviolet light (Gudden‐Pohl effect) is investigated. A method is used, which enables to study the temperature dependence of flash intensity for different applied voltages conditioned by centres of certain depth. The results are compared with the electron tunneling probability from the centre to the conduction band under phonon participation obtained in the paper. [Russian Text Ignored]