Slow Positron Beam Probe for the ZnO/Silicone under Proton Irradiation
The degradation of ZnO/Silicone coating system under 90keV proton irradiation varying from 5×1014cm-2 to 1×1016cm-2, was studied by slow positron annihilation spectrum. Effective diffusion length calculated by Variable energy positron fit (VEPFIT) shows a dramatically break in a dose of 1×1015cm-2. It is ascribed to the increase of crosslink density and decrease of free volume and hole during the proton irradiation. Furthermore, positron has shown a satisfying sensitivity in detecting the nano-scale defect on ZnO/Silicone system.
S. J. Wang, Z. Q. Chen, B. Wang and Y. C. Jean
Y. P. Hao et al., "Slow Positron Beam Probe for the ZnO/Silicone under Proton Irradiation", Materials Science Forum, Vol. 607, pp. 108-110, 2009