【摘要】 采用ＣＲ－３９固体径迹探测器，根据辐射损伤密度沿粒子的径迹分布规律，测定了经３、４ｃｍ空气降能和φ１ｍｍ孔准直的α粒子（５．１５ＭｅＶ）的Ｂｒａｇｇ峰位。对于通过３ｃｍ空气后能量降至～１２ＭｅＶ的α粒子，在ＣＲ－３９中的Ｂｒａｇｇ峰位大约在７μｍ深度处，理论计算值在６．１４μｍ，实验值与理论值符合得较好。更多还原

【Abstract】 sing a CR-39 solid track detector the Bragg peak location for 239Pu α-particles (5.15MeV) passing through an air gap of 3 or 4cm and a collimater of φ1mm aperture is determined according to the distribution rule of radiation damage density along charged particle tracks. For a-particles of about 1.2MeV, the Bragg peaks in CR-39 are located at about 7 μm, and the calculated value in this case is 6.14 μm. The experimental result is in good agreement with the theoretical value.更多还原