THERMALLY STIMULATED ELECTRON-EMISSION FROM K-BI-GICS

The results of the investigations of thermally stimulated electron emi ssion from graphite submitted to intercalation of K-Bi alloy, in the t emperature range of 100-400 K, are presented. Total and partial pressu re in the measuring chamber in relation to the temperature of the samp le are also reported. The insertion of a K-Bi alloy into the interlaye rs of graphite considerably changes thermally stimulated electron emis sion properties. The emission images I(T) depend on the content of int ercalate and the emission maxima obtained at temperatures of about 170 and 210 K are conditioned by the desorption of a gas while the total pressure above the different samples is of the same order. The desorpt ion of gases at a temperature over 250 K does not cause any increase i n the electron emission.