The intensities of ortho-positronium components related to the pores and to small voids in the bulk were determined for a series of Vycor glasses. The ratio of ``pore fraction'' to the total o-Ps yield depends on the specific surface area of the porous medium. The diffusion coefficient for o-Ps was found equal to 3.7 x 10-s cm2/s.
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机译：对于一系列Vycor眼镜，确定了与孔和主体中的小空隙相关的邻位正电子组分的强度。 ``孔分数''与总O-Ps产量的比率取决于多孔介质的比表面积。发现o-Ps的扩散系数等于3.7 x 10-s cm2 / s。
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