[4] Sen P,Pickard D S,Schneider J E,et al. Lifetime and reliability results for a negative electron affinity photocathode in a demountable vacuum system.The Journal of Vacuum Science and Technology,1998,B16(6):3380~3384
[5] Guo Tailiang,Gao Huairong.Photoemission stability of negative electron affinity GaAs photocathodes.SPIE,1993,1982: 127~137
[6] Guo Tailiang. The adsorption of Cs and O2 on a clean GaAs(110) surface under light illumination.Journal of Vacuum Science Technology,1989,7(3):1563~1567