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近二十年来,人们对实验G值大于0.5的原因进行了探讨,但未得到今人满意的结果,原因是只注意到了在数量上内表面的潜伏径迹密度为外表面潜伏径迹密度的二倍。对潜伏径迹在长度分布特点上的差别,以及这种差别对蚀刻特性与观测效率的影响缺乏认识,还没有对蚀刻作用进行定量的计算,因此只能根据蚀刻前的潜伏径迹与可蚀刻径迹概念考虑问题。理想G值实质上是外表面与内表面可蚀刻径迹密度之比,它反映了蚀刻前的情形;而实
In the recent two decades, the reason why the experimental G value is greater than 0.5 has been discussed, but no satisfactory results have been obtained because only the latent track density of the inner surface is quantitatively observed as the latent track density of the outer surface Twice. Latent track on the length of the distribution characteristics of the differences, and the difference between the etching characteristics and the lack of understanding of the impact of observation efficiency, has not yet been quantified for the calculation of etching, it can only be based on latent tracks before etching and can be etched Trajectory concept to consider the problem. The ideal G value is essentially the ratio of the etched track density of the outer surface to the inner surface, which reflects the situation before etching;