Experimental results obtained in the ps regime with LaB6 compounds were compared with those for LaB6 <100> monocrystals. Quantum yield values of up to 6.8 x 10-4 were obtained by using the fourth harmonic of a ND:YAG laser. The lifetime of the classical thermionic cathodes could be improved by heating the photocathode to just below the thermo-emission threshold. Measurements were performed to verify the temperature effects on this parameter.

Short Pulse Photoemission from LaB6-Based Materials. Leblond, B., Kuznetsov, G., Batazova, M.: Nuclear Instruments and Methods in Physics Research A, 1996, 372[3], 562-6