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用屏栅电离室对α、ｔ和ｐ在Ａｒ与Ｋｒ中到达电离密度重心的径迹长度Ｘ进行了测量，并根据Ｔｒｉｍ程序和其它文献的阻止本领数据对其进行了计算。理论值与实验结果符合较好。
The length of track X where the center of gravity of a, t, and p reached the ionization density in Ar and Kr was measured using a grid ionization chamber and was calculated based on the Trim procedure and other preclinical data. The theoretical value is in good agreement with the experimental results.