【摘要】 本文介绍了为模拟荷能重离子在等效生物组织中径迹和能量沉积分布研究而设计、制造的无壁正比计数器和探测系统，并利用放射源２３９Ｐｕ的α粒子（能量为５．１５５ＭｅＶ）在５００Ｐａ气压及工作气体为ＣＨ４（１０％）＋Ａｒ（９０％）下，对本探测器系统的分辨率与所加高压的关系进行了实验，并就利用此探测器系统研究微剂量学的研究方法进行了讨论。更多还原

【Abstract】 The structure and character of a cylindrical wall less proportional counter and its measurement system are introduced in the paper, which was designed to simulate the track structure and energy deposition distribution of heavy ion in tissue equivalent gas. In the experiment, 239 Pu α source was used to study the variation of FWHM of the detector system with the anode voltage at the pressure 500 Pa. A research method of microdosimetry was discussed by using the detection system. (更多还原